Holt Executive Ltd

A leading aerospace engineering firm is seeking a Configuration Management Engineer to ensure effective configuration and data management in a safety-critical environment. This role involves driving proactive processes, conducting audits, and managing configuration baselines. Candidates should have strong CM knowledge, practical experience, and at least a degree with relevant experience. The position offers flexible work options, competitive leave, and a supportive work environment focused on high-performance airborne systems.

An opportunity has arisen for a Configuration Management Engineer to support the development of mission critical electro mechanical and pneumatic systems used on advanced airborne platforms. This role sits within a highly regulated, safety critical environment supporting complex aerospace programmes across the full engineering lifecycle. You will work closely with multidisciplinary delivery teams, ensuring robust configuration and data management processes are embedded from requirements definition through to verification and audit. As a Configuration Engineer, you will be responsible for discharging the five key Configuration Management activities across delivery teams and programme lifecycle phases. You will provide clear direction on CM and Data Management processes and tools, covering system requirements, hardware, software and modelling environments. Key Responsibilities Drive a proactive Configuration and Data Management approach across engineering teams Deliver agreed work packages to cost and schedule constraints Develop, review and execute Configuration Management Plans Configuration Identification across system, software and hardware artefacts Change Control - analyse proposed design changes for system level impact Co chair and operate Change Control Boards Provide Configuration Status Accounting and manage configuration baselines Conduct Functional and Physical Configuration Audits Ensure project datasets remain controlled and aligned with programme governance Manage release, submission and tracking of contract and supplier data What We're Looking For Strong understanding of Configuration Management aligned to DEF STAN and EIA 649A 1 Practical experience across the five CM pillars Experience within safety critical product development environments Data Management experience supporting contractual and supplier deliverables Excellent organisational skills with strong attention to detail Logical, structured mindset with the ability to influence delivery teams Degree with 4+ years' relevant experience (or 10+ years' equivalent industry experience) Ability to interface confidently across engineering functions and occasionally with customers Working Environment You will join a dynamic aerospace engineering environment focused on the design, manufacture and test of high performance airborne systems. The organisation supports advanced platforms worldwide and operates within a structured, quality driven framework typical of regulated defence and aerospace programmes. Benefits Half day finish on Fridays Hybrid & flexible work options 25 days annual leave (plus bank holidays), increasing with service Option to buy/sell up to 5 days annual leave Private medical insurance (optional family cover) Pension scheme with up to 8% employer contribution Life assurance and group income protection Flexible benefits package (health cash plan, dental insurance, gym membership, EV scheme, cycle to work, critical illness cover) Employee assistance programme (mental health & wellbeing support) Professional membership reimbursement (discretionary)

A leading technology organisation operating within the secure communications and defence sector is seeking an experienced Senior Software Technical Lead to provide technical leadership across the development of secure software solutions. This is a high-impact role combining hands on engineering delivery with technical governance, process improvement, and team mentorship. You will act as a key technical authority, driving software engineering excellence, improving development practices, and supporting multidisciplinary teams in delivering complex, high assurance systems. Working closely with software engineers, systems engineers, and project teams, you will help shape software architecture, establish engineering standards, and ensure successful delivery against technical and programme objectives. Due to business requirements applicants must be a sole UK national and eligible to obtain UK security clearance. Key Responsibilities Technical Leadership & Engineering Governance Define, improve, and maintain software development processes, tools, and engineering workflows. Provide architectural guidance and technical oversight across software development activities. Establish and enforce quality standards, peer review processes, and engineering best practices. Support project delivery by identifying and removing technical barriers. Team Mentorship & Development Mentor and support software engineers, helping to develop technical capability and engineering excellence. Identify skills gaps, training requirements, and future capability needs. Promote collaboration across software, systems, and wider engineering teams. Software Development & Delivery Lead software architecture design and implementation for embedded systems and user applications. Drive software verification and validation activities, including design verification testing. Support complex technical investigations, defect resolution, and sustaining engineering activities. Provide technical support across legacy systems, upgrades, and component lifecycle challenges. Required Experience & Qualifications 10+ years' experience within software engineering environments. Degree in Software Engineering, Computer Science, or a related technical discipline. Proven experience leading software development activities and defining engineering processes. Strong understanding of software quality frameworks, governance, and technical reviews. Experience working within secure or regulated engineering environments. Must be a sole UK national and eligible to obtain UK security clearance. Desirable Experience Experience with high-assurance software development standards and secure coding practices. Strong low-level programming experience using C/C++ within embedded systems environments. Experience working with microcontrollers and Real-Time Operating Systems (RTOS). Experience mentoring engineers and improving technical capability without direct line management responsibility. Why Apply? This is an opportunity to take a leading technical role within a highly skilled engineering environment, shaping software development practices and contributing to the delivery of secure, mission critical technology. You will have the opportunity to influence architecture, mentor engineers, and drive engineering excellence across complex programmes.

A leading satellite communications organisation is seeking an experienced Systems Engineer to join its Access Networks engineering team, supporting the design, integration, and deployment of next-generation satellite communications systems. This is an exciting opportunity to play a key role in the development of advanced 5G Non Terrestrial Networks (NTN), working across cutting edge satellite programmes and helping deliver innovative connectivity solutions. You will contribute throughout the full systems engineering lifecycle, from requirements definition and architecture through integration, testing, and operational deployment. Working within a multidisciplinary engineering environment, you will collaborate with systems, software, network, and operations teams while acting as a technical authority across complex communications programmes. Key Responsibilities Lead systems engineering activities for Radio Access Network (RAN) and Access Network subsystems. Develop and manage system requirements, specifications, and technical documentation. Support the design, integration, validation, and deployment of advanced satellite ground segment capabilities. Design and validate 5G NTN Layer 2 and Layer 3 features in line with 3GPP standards. Lead simulation and modelling activities to evaluate system performance and inform engineering decisions. Develop test methodologies, tools, and validation campaigns for new network capabilities. Support the deployment of laboratory and test infrastructure for next generation communications systems. Collaborate with software, systems, operations, and programme teams to successfully introduce new services. Investigate and resolve complex technical challenges across multiple engineering disciplines. Contribute to future radio resource management strategies to maximise network performance and efficiency. Monitor industry developments and emerging technologies, helping shape future system architecture and technology roadmaps. Provide technical leadership during integration, testing, and service introduction activities. Required Experience & Qualifications Degree in Electronic Engineering, Telecommunications, Satellite Communications, Computer Science, or a related engineering discipline. Strong systems engineering experience within telecommunications or satellite communications environments. Knowledge of Radio Access Network (RAN) technologies. Understanding of: 5G Non Terrestrial Networks (NTN) Satellite propagation Modulation and coding Mobile satellite and VSAT systems Experience developing system requirements, specifications, and technical documentation. Desirable Experience Experience with any of the following would be advantageous: 3GPP 5G standards Satellite ground segment systems Terrestrial mobile network design and operation Radio resource management RF systems and antenna technologies (Ka, L or Q/V Band) Performance modelling, simulation, and data analysis Large scale telecommunications or satellite network integration programmes Why Apply? This is an opportunity to work on some of the most advanced satellite communications programmes currently in development, helping deliver next generation global connectivity solutions. You'll join a highly collaborative engineering environment where you'll influence system architecture, contribute to innovative technologies, and work across the full lifecycle of complex satellite communications systems. Benefits Hybrid and flexible working arrangements. Competitive salary and comprehensive benefits package. Pension scheme and private healthcare. Professional development and training opportunities. Opportunity to work on cutting edge satellite and 5G NTN technologies. Collaborative engineering culture with exposure to complex international programmes.

Holt Executive Ltd is seeking a Senior Software Technical Lead for a leading technology organisation operating in secure communications and defence. The role blends hands on delivery with technical governance, shaping architecture and engineering standards. You will mentor engineers, drive high assurance software programs, and collaborate with cross disciplinary teams to deliver complex systems. Applicants must be sole UK nationals eligible for UK security clearance.

A leading satellite communications organisation is seeking an experienced Systems Engineer to join its Access Networks engineering team, supporting the design, integration, and deployment of next-generation satellite communications systems. This is an exciting opportunity to play a key role in the development of advanced 5G Non Terrestrial Networks (NTN), working across cutting edge satellite programmes and helping deliver innovative connectivity solutions. You will contribute throughout the full systems engineering lifecycle, from requirements definition and architecture through integration, testing, and operational deployment. Working within a multidisciplinary engineering environment, you will collaborate with systems, software, network, and operations teams while acting as a technical authority across complex communications programmes. Key Responsibilities Lead systems engineering activities for Radio Access Network (RAN) and Access Network subsystems. Develop and manage system requirements, specifications, and technical documentation. Support the design, integration, validation, and deployment of advanced satellite ground segment capabilities. Design and validate 5G NTN Layer 2 and Layer 3 features in line with 3GPP standards. Lead simulation and modelling activities to evaluate system performance and inform engineering decisions. Develop test methodologies, tools, and validation campaigns for new network capabilities. Support the deployment of laboratory and test infrastructure for next generation communications systems. Collaborate with software, systems, operations, and programme teams to successfully introduce new services. Investigate and resolve complex technical challenges across multiple engineering disciplines. Contribute to future radio resource management strategies to maximise network performance and efficiency. Monitor industry developments and emerging technologies, helping shape future system architecture and technology roadmaps. Provide technical leadership during integration, testing, and service introduction activities. Required Experience & Qualifications Degree in Electronic Engineering, Telecommunications, Satellite Communications, Computer Science, or a related engineering discipline. Strong systems engineering experience within telecommunications or satellite communications environments. Knowledge of Radio Access Network (RAN) technologies. Understanding of: 5G Non Terrestrial Networks (NTN) Satellite propagation Modulation and coding Mobile satellite and VSAT systems Experience developing system requirements, specifications, and technical documentation. Desirable Experience Experience with any of the following would be advantageous: 3GPP 5G standards Satellite ground segment systems Terrestrial mobile network design and operation Radio resource management RF systems and antenna technologies (Ka, L or Q/V Band) Performance modelling, simulation, and data analysis Large scale telecommunications or satellite network integration programmes Why Apply? This is an opportunity to work on some of the most advanced satellite communications programmes currently in development, helping deliver next generation global connectivity solutions. You'll join a highly collaborative engineering environment where you'll influence system architecture, contribute to innovative technologies, and work across the full lifecycle of complex satellite communications systems. Benefits Hybrid and flexible working arrangements. Competitive salary and comprehensive benefits package. Pension scheme and private healthcare. Professional development and training opportunities. Opportunity to work on cutting edge satellite and 5G NTN technologies. Collaborative engineering culture with exposure to complex international programmes.

Holt Executive Ltd. seeks an experienced Systems Engineer to join the Access Networks engineering team, contributing to the design, integration and deployment of next generation satellite systems. You will work across the full lifecycle from requirements through integration, testing and deployment, supporting 5G NTN initiatives and multi discipline project teams in a dynamic environment.

Holt Executive Ltd. seeks an experienced Systems Engineer to join the Access Networks engineering team, contributing to the design, integration and deployment of next generation satellite systems. You will work across the full lifecycle from requirements through integration, testing and deployment, supporting 5G NTN initiatives and multi discipline project teams in a dynamic environment.

A dynamic recruitment firm in the UK is seeking a Software Engineer to join their team developing marine-based systems. In this role, you will design and develop high-quality software focused on user interface design. The ideal candidate has proven experience with Java, a strong understanding of software engineering principles, and excellent communication skills. The position offers flexible hybrid working arrangements and excellent development opportunities, making a significant impact in mission-critical software solutions.

An exciting opportunity for a Software Engineer to join a growing team developing marine-based systems used in complex, real-world environments. This role focuses on User Interface design and development, contributing to high-integrity, mission-critical software solutions that make a real impact. As a Software Engineer, you'll work across the full engineering lifecycle, from design and prototyping to delivery and support, as part of a multidisciplinary team building next-generation maritime technology. What you'll be doing as a Software Engineer Designing and developing high-quality software for marine-based applications Creating and refining user interfaces with a strong focus on usability and performance Supporting testing, integration and delivery of software solutions Collaborating with hardware and systems engineers to deliver cohesive, safe, and secure solutions Providing mentorship and technical guidance to junior team members What you'll bring as a Software Engineer Proven experience in software delivery using Java Strong understanding of software engineering principles, tools, and lifecycle processes Experience with UI/UX design, JavaFX, and UML design (Enterprise Architect experience a plus) Strong communication skills with the ability to engage users and stakeholders A proactive, team-oriented approach and commitment to high-quality outcomes Desirable experience for the Software Engineer Java build systems (Maven) and version control (Git) Atlassian toolset (Jira, Bitbucket, Confluence) Database interfacing and service/subscriber architectures DevOps tools (Jenkins, SonarQube, Artifactory) Why apply? Hybrid and flexible working arrangements (full-time, part-time, or condensed hours) Excellent development and progression opportunities Collaborative and supportive engineering culture Competitive salary and benefits Security Clearance: Applicants must be eligible to obtain UK Security Clearance (SC).

A leading engineering firm in the UK is seeking an experienced Software Engineer to develop advanced software solutions for autonomous systems in marine and defence technology. You will lead software design and collaborate with multidisciplinary teams, ensuring integration and delivery of projects. Applicants should have a degree in Software Engineering or Computer Science, strong Java development skills, and experience with the Atlassian toolset. The role offers flexible working options and opportunities for professional development.

Join a cutting-edge engineering team developing autonomous systems for the next generation of marine and defence technology. This is a fantastic opportunity for an experienced Software Engineer to take a leading role in designing, developing, and delivering advanced software solutions that operate in challenging real-world environments. You'll work across the full software lifecycle, from concept and design through to integration, testing and delivery, as part of a multidisciplinary engineering team shaping the future of maritime autonomy. What you'll be doing Designing and developing software for advanced autonomous systems Supporting integration and delivery activities across complex engineering projects Collaborating with hardware, systems and domain experts throughout the development lifecycle Engaging directly with end users to refine functionality and performance Taking a lead role in development discussions and cross-team collaboration What you'll bring Proven experience in software design and delivery A degree (or equivalent experience) in Software Engineering, Computer Science, or a related discipline Knowledge of autonomous system architectures and the marine or defence domain Strong understanding of software engineering processes, tools, and lifecycles Experience working in multi-disciplinary engineering environments Technical skills Essential: Java development Java build systems (e.g. Maven) Experience with the Atlassian toolset (Jira, Confluence, Bitbucket) Knowledge of ISO 9001 quality principles Desirable: HMI / UI development (e.g. JavaFX) GIS development Communication and control system interfaces Git version control UML design Why apply? Hybrid and flexible working options (full-time, part-time or condensed hours) Excellent professional development and progression opportunities Collaborative and innovative engineering culture Competitive salary, pension and benefits Security Clearance: Applicants must be eligible to obtain UK Security Clearance (SC).

Holt Executive Ltd. seeks a Senior Algorithms Engineer to join an innovative team working on advanced machine learning and computer vision solutions. You will own challenging perception projects, contributing to data processing workflows and deployment within complex software systems. The role offers collaboration across AI and CV domains, opportunities to mentor colleagues, and a path to influence future development with a focus on delivering production-ready algorithms.

We are looking for a talented Senior Algorithms Engineer to join an innovative engineering team developing advanced machine learning and computer vision solutions for complex, real-world applications. This is an exciting opportunity for an experienced engineer to work on challenging perception and intelligence problems, applying techniques across AI, computer vision, image processing, and statistical modelling. You will play a key role in developing algorithms that enable systems to better detect, interpret, and respond to their environment. The successful candidate will have the opportunity to take ownership of technically challenging projects, influence future development activities, and support the growth of engineering capability through collaboration and mentoring. Key Responsibilities Develop and optimise machine learning and computer vision algorithms for real-world applications. Investigate complex technical challenges, designing experiments and approaches to identify effective solutions. Analyse datasets, model performance, and system behaviour to improve algorithm capability. Support the development of automated workflows for data processing, training, testing, and evaluation. Contribute to the integration and deployment of algorithms within advanced software systems. Share technical knowledge, mentor colleagues, and contribute to best practice across the engineering team. Keep up to date with emerging developments in AI, machine learning, and computer vision. Experience Required Degree or equivalent experience in Computer Science, Artificial Intelligence, Engineering, Mathematics, Physics, or a related discipline. Proven experience developing machine learning or computer vision algorithms for production or near-production environments. Strong understanding of modern computer vision techniques, including object detection, image classification, and deep learning architectures. Experience working with image datasets and applying image processing techniques to improve model performance. Strong programming skills in Python, with experience in C++ for performance-critical applications. Ability to solve complex technical problems through structured investigation and practical experimentation. Strong communication skills with the ability to explain technical concepts clearly. Due to the nature of the work, successful applicants will be required to obtain UK Security Clearance. Desirable Experience Experience with any of the following would be beneficial: Statistical modelling, Bayesian methods, uncertainty estimation, or probabilistic techniques. Synthetic data generation, multi-modal AI, or action recognition. Machine learning development tools, experiment tracking, dataset management, or CI/CD pipelines. Automation of development, testing, or deployment workflows. Cross-platform C++ development and build systems such as CMake. Benefits Hybrid and flexible working arrangements. 37.5-hour working week with Friday lunchtime finish. 28 days annual leave plus Christmas closure. Holiday purchasing scheme. Matched pension contributions up to 6%. Private medical insurance and income protection. Life assurance and employee assistance programme. Share incentive and savings schemes. Electric vehicle salary sacrifice scheme. Wellbeing support and employee benefits platform. Learning and development opportunities.

Holt Executive Ltd. is seeking a Senior Algorithms Engineer to join our innovation-focused engineering team. You will develop and optimise machine learning and computer vision algorithms for challenging, real-world applications, spanning data analysis, experimentation, and deployment in advanced software systems. You will own technically demanding projects, mentor peers, and contribute to shaping future perception and intelligence capabilities while collaborating across disciplines and ensuring

We are looking for a talented Senior Algorithms Engineer to join an innovative engineering team developing advanced machine learning and computer vision solutions for complex, real-world applications. This is an exciting opportunity for an experienced engineer to work on challenging perception and intelligence problems, applying techniques across AI, computer vision, image processing, and statistical modelling. You will play a key role in developing algorithms that enable systems to better detect, interpret, and respond to their environment. The successful candidate will have the opportunity to take ownership of technically challenging projects, influence future development activities, and support the growth of engineering capability through collaboration and mentoring. Key Responsibilities Develop and optimise machine learning and computer vision algorithms for real-world applications. Investigate complex technical challenges, designing experiments and approaches to identify effective solutions. Analyse datasets, model performance, and system behaviour to improve algorithm capability. Support the development of automated workflows for data processing, training, testing, and evaluation. Contribute to the integration and deployment of algorithms within advanced software systems. Share technical knowledge, mentor colleagues, and contribute to best practice across the engineering team. Keep up to date with emerging developments in AI, machine learning, and computer vision. Experience Required Degree or equivalent experience in Computer Science, Artificial Intelligence, Engineering, Mathematics, Physics, or a related discipline. Proven experience developing machine learning or computer vision algorithms for production or near-production environments. Strong understanding of modern computer vision techniques, including object detection, image classification, and deep learning architectures. Experience working with image datasets and applying image processing techniques to improve model performance. Strong programming skills in Python, with experience in C++ for performance-critical applications. Ability to solve complex technical problems through structured investigation and practical experimentation. Strong communication skills with the ability to explain technical concepts clearly. Due to the nature of the work, successful applicants will be required to obtain UK Security Clearance. Desirable Experience Experience with any of the following would be beneficial: Statistical modelling, Bayesian methods, uncertainty estimation, or probabilistic techniques. Synthetic data generation, multi-modal AI, or action recognition. Machine learning development tools, experiment tracking, dataset management, or CI/CD pipelines. Automation of development, testing, or deployment workflows. Cross-platform C++ development and build systems such as CMake. Benefits Hybrid and flexible working arrangements. 37.5-hour working week with Friday lunchtime finish. 28 days annual leave plus Christmas closure. Holiday purchasing scheme. Matched pension contributions up to 6%. Private medical insurance and income protection. Life assurance and employee assistance programme. Share incentive and savings schemes. Electric vehicle salary sacrifice scheme. Wellbeing support and employee benefits platform. Learning and development opportunities.

Holt Executive Ltd in Greater London seeks a Senior Space Systems Engineer to support high-performance space-based systems for global communications and navigation. You will lead technical activities and contribute to the design and development of mission-critical systems. Qualified candidates will have significant experience in the space industry, a degree in a relevant field, and strong skills in systems engineering and spacecraft development. This role offers the opportunity to work within a strategic engineering team.

We are supporting a leading technology organisation in the search for a Cyber Security Analyst to join its Security Operations team. This is an excellent opportunity to join a fast paced cybersecurity environment, helping to protect critical infrastructure and enterprise systems through proactive monitoring, incident response, and threat analysis. Working as part of a 24/7 operational security function, you will play a key role in identifying, investigating, and responding to security threats across both cloud based and on premise environments. Key Responsibilities Monitor security events, alerts, and incidents across enterprise networks and systems. Manage security cases and tickets through to resolution. Analyse logs and data from SIEM platforms, security monitoring tools, network infrastructure, and endpoint technologies. Investigate and triage security alerts to identify malicious activity and determine attack methods and techniques. Follow established incident response and escalation procedures to contain and mitigate security risks. Ensure all incidents are accurately documented, including indicators of compromise, evidence, and investigation findings. Identify and address false positives, providing feedback to improve detection capabilities. Support the development and optimisation of security monitoring rules and processes. Analyse data sets to identify security gaps and recommend improvements. Skills & Experience Essential Degree in Information Security, Computer Science, Digital Forensics, or a related discipline, or equivalent industry experience. 3+ years' experience in cyber security, security operations, threat analysis, or security monitoring. Experience investigating security incidents and working within a Security Operations Centre environment. Understanding of incident response processes, security event triage, and escalation procedures. Strong knowledge of networking protocols, authentication mechanisms, and common attack techniques. Good understanding of information security principles, technologies, and best practices. Experience securing and supporting Windows and Linux environments. Excellent written and verbal communication skills. Desirable Industry certifications such as GCIH, GCIA, or equivalent cyber security qualifications. Experience working with SIEM platforms and security monitoring technologies. Knowledge of Oracle and virtualised environments. What's on Offer Opportunity to work within a highly skilled cyber security team. Exposure to complex security environments and emerging threats. Ongoing professional development and training opportunities. Collaborative and supportive working culture. Competitive salary, bonus and benefits package.

We are seeking a highly experienced Senior Space Systems Engineer to support the design, development, and integration of complex space-based systems across telecommunications and positioning, navigation, and timing domains. This is a senior-level opportunity within a strategic engineering team focused on delivering high-performance, resilient global communication and navigation capabilities for mission critical users. The role spans early concept studies through to full system development and delivery. You will be part of a multidisciplinary engineering environment, contributing to the growth of advanced systems engineering capability while helping shape next generation space enabled services. Key Responsibilities Lead and support technical activities across mission concept studies, research programmes, and full system development projects Conduct mission analysis, trade studies, and system architecture design Manage system and subsystem requirements capture, flow down, and verification Develop and maintain system budgets (mass, power, data, thermal) and performance models Contribute to strategic development of PNT and telecommunications capabilities Support engagement with institutional and governmental space organisations and stakeholders Produce technical reports, bid documentation, and engineering recommendations for senior stakeholders Identify and manage programme risks, assumptions, dependencies, and technical issues Perform reliability, availability, and maintainability (RAMS) analysis of system architectures Apply Model Based Systems Engineering (MBSE) tools and approaches to validate system designs Experience Required Degree qualified in Physics, Engineering, Mathematics, or a related numerate discipline (or equivalent experience) Significant experience in systems engineering or system architecture roles within the space industry or a related sector Strong understanding of spacecraft systems, space mission operations, and spacecraft development (including AIT processes) Experience with system modelling tools such as STK, MATLAB, and MBSE platforms (e.g. Enterprise Architect) Knowledge of orbit determination techniques and space system analysis Strong understanding of project management and financial modelling principlesExcellent communication skills, including technical writing and stakeholder presentations at all levels Membership of a professional engineering institution (e.g., INCOSE or equivalent) is desirable Desirable Experience Knowledge of PNT systems, GNSS, satellite based augmentation systems, or time transfer techniques Experience with advanced space system operations and analysis methodologies Familiarity with alternative timing systems beyond GNSS based solutions Exposure to large scale international space or government programmes

Holt Executive Ltd is looking for a Cyber Security Analyst to join its Security Operations team in Greater London. This role offers a chance to work in a fast-paced cybersecurity environment, focusing on protecting critical infrastructure through proactive monitoring and incident response. The ideal candidate will have a degree in Information Security or related fields, with over 3 years of relevant experience. This position provides competitive salary and professional development opportunities.