Cirrus Selection

Cirrus Selection is seeking a Simulation Systems Maintenance Engineer in Stevenage. You will support and maintain critical simulation systems, combining practical engineering with fault finding and continuous improvement. The ideal candidate will have a degree in mechanical engineering or a related field, experience with hydraulic and control systems, and strong problem-solving abilities. Join a skilled team to work on complex, cutting-edge technologies. This role offers opportunities for career development in a specialized engineering environment.

Up to £55,000 Overtime Bonus Flexi-Leave Pension - Up to 14% Contribution Permanent Bristol - Avon - South-West UK Are you passionate about mathematics, modelling, machine learning, and solving complex engineering challenges? We're looking for an Algorithm Developer to join a highly skilled engineering team working on advanced complex systems technology. This is an exciting opportunity to work on cutting edge algorithm development within a collaborative environment where innovation, technical excellence, and problem solving are at the heart of what we do. You will join a specialist team focused on developing sophisticated algorithms that support next generation complex systems. Working across simulation, modelling, artificial intelligence, and data analysis, you'll help develop high performance solutions that push technological boundaries. This role would suit someone who enjoys applying mathematics to real world engineering problems and wants to work in a technically challenging environment. Responsibilities Designing, developing, and testing mathematical algorithms Working with MATLAB/Simulink and Python Supporting numerical modelling and simulation activities Collaborating with software and systems engineering teams Interpreting technical specifications and requirements Supporting algorithm implementation and integration Contributing to continuous improvement and technical innovation Applying rigorous engineering and quality standards throughout development What We're Looking For Experience in some of the following areas would be beneficial: Mathematical analysis or modelling Numerical simulation Data science and machine learning Geospatial data or geographical information systems (GIS) Software development Python and/or MATLAB/Simulink Complex systems engineering Artificial intelligence or advanced analytics You will ideally have a numerate degree or postgraduate qualification in Mathematics, Physics, Engineering, Computer Science, Data Science, or a related discipline. What's on Offer? Company bonus, Excellent pension contribution, Paid overtime opportunities, Flexible and hybrid working arrangements, Enhanced parental leave, Flexi leave allowance, Subsidised meals and free parking, and Ongoing professional and technical development This is a fantastic opportunity to join a forward thinking engineering environment working on advanced technologies with real world impact. Security Due to the nature of the work, applicants must be either sole British Citizens or dual nationals with British Citizenship and will be required to undergo security clearance checks to SC Level.

Salary: Up to £58,000, depending on experience Location: Stevenage or Bristol Hours: 37 per week Want to work on genuinely cutting-edge technology? We're looking for talented Algorithms Engineers to join a growing team developing next-generation RF sensing and advanced multi-mode systems. This is a rare opportunity to work on highly sophisticated technology programmes involving Active Electronically Scanned Arrays (AESA), advanced signal processing, AI integration, and complex systems modelling. If you enjoy solving difficult technical problems, developing real-world algorithms, and working alongside some of the brightest engineering minds in the industry, this role offers serious technical depth and long-term career growth. What you'll be doing Developing and refining advanced algorithms for complex RF systems Conducting system studies and performance analysis Integrating algorithms into sophisticated seeker and sensor models Running investigations and analysing data to support systems design Identifying opportunities for innovation, optimisation, and future capability improvements Collaborating across multidisciplinary engineering teams Contributing to the use of AI and machine learning within advanced technology solutions What we're looking for Essential Strong algorithm development experience MATLAB capability Experience planning and running technical investigations Strong data analysis skills Problem solving mindset with a passion for technology and innovation Desirable Simulink modelling and coding RF systems or digital signal processing knowledge Machine Learning / AI experience Technical report writing Experience developing and testing technical hypotheses Why join? Bonus scheme Excellent pension contribution, up to 14% Paid overtime opportunities Flexible and hybrid working Excellent on-site facilities including subsidised meals and free parking This is an outstanding opportunity to work on advanced technology programmes that are shaping the future of RF and intelligent sensing systems. Security Due to the nature of the work, applicants must be British Citizens or Dual UK Nationals with British citizenship and will be required to undergo security clearance checks.

Cirrus Selection is seeking talented Algorithms Engineers in Stevenage or Bristol to work on advanced RF sensing technology. This role involves developing and refining algorithms, conducting system studies, and integrating algorithms into sophisticated systems. Ideal candidates have strong algorithm development experience, proficiency in MATLAB, and a passion for technology. Joining Cirrus offers a bonus scheme, flexible working, and excellent facilities. Applicants must be British citizens or dual UK nationals, as security clearance is required.

Software Architect Location: Stevenage What's on Offer: A base salary up to £80,000, 21% bonus, Strong pension, flexible working If you have a passion for software architecture and a desire to contribute to projects that matter, this opportunity may be for you. As a Software Architect, you will play a crucial role in designing innovative solutions and ensuring the integrity and robustness of software systems within the defence sector. You will be the author of the entire software architecture, working with software delivery teams to define and monitor the Structural and Temporal Architecture, including the Internal/External interfaces of the product to meet requirements. Key Responsibilities: Identify, document and be responsible for the design drivers for the software solution e.g. real-time performance, safety, security, user experience, simplicity, reusability, flexibility. Produce derived and emergent requirements capturing the assumptions and rationale. Define the architecture to a point where the implementation decisions do not affect the integrity of the architecture. What We're Looking For: Proven experience as a Software Architect in a relevant field. A strong technical practitioner, comfortable with making important architectural and design decisions. Knowledge of modern and established software architecture techniques and design patterns Strong understanding of software design principles and testing strategies. Experience of model-based engineering. Experience working with abstraction layers and software stacks. Astrong programming background, preferably with experience in more than one language This is a fantastic opportunity to join a dynamic and forward-thinking company where your contributions will have a meaningful impact. If you're ready to take the next step in your career, we invite you to apply and explore this exciting role with us.

A leading engineering firm is looking for a Senior Systems Engineer specializing in aerospace and RF communications. The role involves capturing customer requirements, defining system architectures, and leading validation activities. Ideal candidates have strong systems engineering experience within regulated environments and a degree in a related discipline. The company offers flexible working, a stable environment, and comprehensive benefits like healthcare and generous holidays.

Senior Systems Engineer - Aerospace / RF Communications Location: Market Deeping Salary: £50,000 - £60,000 + strong benefits If you're an experienced Systems Engineer in aerospace or safety critical communications, you'll know how rare it is to find a role where systems thinking genuinely drives the product. This is one of those roles. You'll join an established engineering organisation delivering RF and aviation communication systems used in critical operational environments worldwide. Engineering standards are high. The work is complex. And your input will directly influence product architecture and long term direction. The Opportunity This is a senior, hands on systems role spanning the full development lifecycle. You will: Capture and structure high level customer and regulatory requirements Define and review system architectures and interfaces Ensure clean requirement flow down into hardware and software Lead and support structured Verification & Validation activity Drive best practice systems engineering aligned to the V model Influence product coherence, commonality and future roadmap decisions You won't be boxed into a narrow slice of the lifecycle. You'll have genuine technical ownership. What We're Looking For Strong Systems Engineering experience within aerospace or other high integrity, regulated environments Proven experience across the full product lifecycle Solid grounding in RF, communications systems or radio technologies Experience with VHF/UHF, CNS or aviation communications is highly desirable Degree in Engineering, Physics or related discipline (or equivalent depth of experience) This is not an IT infrastructure role. It suits engineers who understand physical systems, integration challenges and operational reliability. Why This Move Makes Sense Stable, long established engineering business Products with real world operational impact Technical depth and long lifecycle programmes Flexible working 25 days' holiday + bank holidays Up to 8% pension contribution Private healthcare Ongoing professional development If you're at the stage in your career where you want more technical influence, more ownership and a business that respects disciplined engineering, this is worth a serious conversation.

Senior Systems Engineer Ampthill 4-Day Week Special Projects SC Clearance Eligible Ready to work on some of the UK's most complex and high-profile defence programmes? We are looking for a Senior Systems Engineer to join a specialist engineering team delivering cutting edge projects within a highly secure environment. This is an opportunity to influence the full engineering lifecycle, contribute to advanced technology programmes, and work alongside some of the industry's leading technical experts. What you will be doing Leading and supporting systems engineering activities across complex programmes Requirements development and management Verification and validation planning Model-Based Systems Engineering (MBSE) Trade studies and technical investigations Systems architecture development and decomposition Research and development activities Working closely with engineering teams, programme leadership and key stakeholders What we are looking for Degree qualified in Systems Engineering, Aerospace, Electrical/Electronic Engineering or a related discipline Experience across the engineering development lifecycle Strong understanding of Systems Engineering principles and methodologies Experience applying MBSE techniques Excellent stakeholder management and communication skills Ability to lead technical work packages across multiple projects Desirable experience SysML/UML modelling tools such as Cameo or Rhapsody DOORS NG, IBM Jazz or similar requirements management tools Architecture frameworks including UAF or NAF MATLAB & Simulink AI/ML applications within engineering environments Agile software development environments Modelling & Simulation, CFD, trajectory modelling or complex algorithm development What is on offer Competitive salary Annual bonus Excellent benefits package Industry leading training and development Genuine career progression opportunities Flexible working arrangements Compressed 4-day working week (Monday to Thursday) Due to the nature of the work, this role is primarily site based in Ampthill and candidates must be eligible to obtain SC Security Clearance, with DV clearance viewed favourably. If you are an experienced Systems Engineer looking to work on challenging programmes that make a real impact, we would like to hear from you. Security This role requires SC clearance to start, but may require Developed Vetting in the future. You will need to be a sole UK national and either hold DV clearance already or be willing to go through the process. Support is provided.

Cirrus Selection is seeking a Senior Systems Engineer in Ampthill. This role involves leading engineering activities on advanced defence projects, contributing to the full lifecycle of systems engineering. Qualified candidates should have a degree in relevant fields and experience in systems engineering methodologies. Benefits include a competitive salary, an annual bonus, and opportunities for career progression within a flexible, 4-day work week.

Cirrus Selection is looking for a Real-Time Systems Software Engineer based in Stevenage, offering a salary up to £65k. You will be working on complex systems involving C++ and Linux, focusing on high-speed data pipelines and real-time processing. This role requires strong technical skills and the ability to take ownership of problems, ensuring impactful contributions to advanced defence systems. Additionally, the position offers a bonus, pension, flexi leave, and paid overtime.

C# Software Engineer Location: Bristol What's On Offer Salary up to £57,000, plus company bonus and overtime - Flexible hybrid working (2-3 days on-site) - Comprehensive benefits including pension contributions up to 14%, enhanced parental leave, and flexi leave Are you a proactive and passionate software developer with a knack for simulation and system development? If so, we have an exciting role tailored for developers experienced in C# within agile environments, especially those with a background in simulation or distributed systems. What You'll Be Doing As the C# Software Engineer, you will become a key member of the System Simulation and Experimentation (SSE) team, developing real-time software components that deliver realistic system simulations. Your work will span the full development lifecycle, including visualisation, verification, validation, and training systems. Utilising agile scrum methodologies, you'll contribute to creating innovative solutions that support some of the most advanced defence systems globally. What We're Looking For Proven experience in practical software engineering with C# (or C++) Knowledge of agile development practices Experience working on simulation, DIS, HLA, or similar systems Familiarity with real-time software, CI/CD, and unit testing Passion for developing innovative technical solutions If you're eager to contribute meaningfully to cutting-edge defence projects and develop your expertise within a trusted and supportive team, this role could be your perfect next step. We invite candidates who thrive in agile, simulation-focused environments to explore this opportunity with confidence. We look forward to welcoming dedicated engineers who want to make a real impact in the defence sector.

Software Quality Engineer Bristol, hybrid working £40,000 to £50,000 + bonus + excellent benefits You know quality isn't just process. It's influence. It's judgement. It's the difference between something that works and something that works when it matters most. This role puts you right in the middle of that. This isnt a role where you will be qualifying software, but a role where you will be shaping the processes and quality that software engineering teams work by. You'll be working with software teams developing complex, safety-critical systems, supporting projects where failure isn't an option. Not policing from the sidelines, but embedded, influencing, challenging, improving. If you've worked across the software lifecycle and want to step further into quality, assurance, and real engineering impact, this is a strong move. What you'll be doing Working alongside software engineers across the full lifecycle Leading and supporting project quality assessments Identifying risks, issues, and areas for improvement Driving best practice across processes, standards, and assurance Influencing teams to deliver better, more robust software What you'll bring Experience in software development and/or quality assurance Understanding of software lifecycle and engineering processes Exposure to standards, assurance, or regulated environments Strong communication, able to challenge and influence Calm, structured thinking when things get complex Audit, configuration management, or requirements tools experience would be useful, but not essential. Why this role Real engineering impact on complex, high-profile systems Clear development path within quality and assurance Strong benefits package, including bonus, pension, overtime and flexible working A collaborative environment where quality has a voice You'll need to be eligible for UK security clearance, holding current British citzenship. If you're looking to move from "doing the work" to shaping how it's done, this is a role worth exploring.

Real-Time Systems Software Engineer Based in Stevenage Salary up to £65k Some software engineering roles are comfortable. Familiar stack, predictable problems, another sprint planning meeting. This isn't one of those. You'll be writing C++ on Linux, working with high speed SFPDP data pipelines and multi threaded architectures that feed directly into the validation of some of the most advanced defence systems in the world. Real hardware. Real consequences. The kind of work that actually matters. The team is small and experienced. No passengers. You'll own problems, make decisions, and see the results of your work in systems that get used. Requirements You need solid C++ and Linux skills; genuine experience with real time data systems and concurrent programming; and the instinct to go deep when something isn't working. SFPDP experience is a bonus, not a dealbreaker. You must be eligible for UK Security Clearance and comfortable being based full time on site in Stevenage. Benefits Up to £2,500 bonus, 14% pension, flexi leave, and paid overtime. If you've been building real time systems and you want the work to mean something, this is worth a conversation.

Cirrus Selection is seeking a C# Software Engineer to join their System Simulation and Experimentation (SSE) team in Bristol. This role involves developing real-time software components that support advanced defence systems, utilizing agile practices and contributing throughout the development lifecycle. Ideal candidates should be experienced in C# programming and have a background in simulation or distributed systems. The position offers a hybrid working model and comprehensive benefits including a competitive salary of up to £57,000, pension contributions, and generous leave policies.

Cirrus Selection is looking for a Software Quality Engineer in Bristol with hybrid working. In this role, you will influence quality processes and work closely with software teams on high-profile, safety-critical systems. The position offers a clear path for development within quality assurance and a strong benefits package, including a bonus and flexible working options. Candidates must be eligible for UK security clearance.

A leading technology firm in Stevenage is seeking a Senior Test Software Engineer. This role focuses on developing high-reliability test solutions that integrate complex defence systems without a login screen. You'll need strong skills in C, C++ or ADA, and the ability to work in mission-critical environments. If your passion is writing clean, dependable code and you enjoy understanding the entire system context, this job might be for you.

Senior Test Software Engineer Based on site in Stevenage Salary from £45,000 - £75,000 DOE + Bonus + 14% Pension + Paid Overtime The software you write won't sit behind a login screen. It will configure, verify and validate complex defence systems. It will be used in development, production and field environments. It has to work. Every time. You'll join a multi-disciplined engineering team building high-reliability test solutions that sit between hardware and mission critical systems. This isn't feature development. It's engineering with consequence. You'll be: Writing robust software in C, C++ or ADA Developing high-performance test applications integrated with real hardware Working closely with Systems, Electronics and Test teams Solving problems that don't stop neatly at the edge of "software" If you enjoy writing clean, documented, dependable code and you like understanding how the whole system works, not just your module, you'll fit well here. What you'll bring: Strong C, C++ or ADA experience Analytical thinking Comfort working in safety or mission critical environments British citizenship or Dual national with British citizenship for security clearance This is engineering that directly supports national capability. If you want your work to mean something, let's talk.

Cirrus Selection is seeking an experienced Systems Engineer to join the Functional Development team in Stevenage. This role offers the chance to work on cutting-edge defence technology, involving requirements management, system development, and international project support. Candidates should have proven experience in systems engineering, knowledge of engineering tools like DOORS, and strong communication skills. The position provides a hybrid working model, excellent salary, and additional benefits including bonuses and enhanced leave packages.

Cirrus Selection is looking for an Electronics Engineer based in the UK to join their team. This hybrid role involves defining system architectures and integrating complex electronic solutions. Candidates should have a degree in Electronic or Electrical Engineering and proven experience in system-level design. Additional perks include competitive salary, bonus opportunities, and flexible working. British citizenship is required for this position due to security clearance standards.

Hybrid (2 to 3 days per week on-site Paid Overtime Annual Bonus Mission Critical Design) Location Stevenage, Bristol or Bolton Hours 37 per week Permanent Are you an Electronics Engineer with a passion for complex systems integration and cutting-edge technology? We're supporting a leading engineering organisation seeking an experienced Electronic Systems Engineer to help deliver sophisticated electronic equipment solutions from concept through to production and deployment. This is an exciting opportunity to work on highly advanced systems in a collaborative, technically challenging environment. Salary & Benefits Circa £52,500 - £57,000 depending on experience Bonus up to £2,500 Hybrid working, 2-3 days on-site Up to 14% combined pension contribution Paid overtime opportunities Up to 15 additional flexi leave days Enhanced parental leave package Healthcare Cash Plan Subsidised meals, free parking and excellent site facilities The Role This is a systems-focused electronics role where you'll take ownership of system-level design activities, helping turn complex requirements into fully integrated hardware solutions. Key responsibilities include: Defining system architectures, equipment breakdowns and subsystem interfaces Managing interconnects between internal and external equipment Producing system schematics, wiring diagrams and interface documentation Supporting integration, validation, testing and deployment activities Conducting root cause investigations and technical problem-solving Ensuring designs meet safety, EMC and regulatory compliance standards Collaborating closely with software, firmware, mechanical and manufacturing teams You will play a key role in shaping robust, reliable electronic systems used within highly regulated, mission-critical environments. What We're Looking For Degree qualified in Electronic Engineering, Electrical Engineering or similar Strong experience in system-level electronic design and integration Experience defining architectures, interfaces and interconnects Good understanding of analogue and digital electronics Ability to produce and interpret technical documentation and schematics Strong communication, analytical and problem-solving skills Experience with engineering tools such as DOORS, Rhapsody or MATLAB Simulink Security You must be a British Citizen or dual national with British Citizenship as this role requires you to gain SC Clearance.