CBS Butler

Application Security Architect Onsite in Bracknell Eligible for DV clearance £65-70k per annum + benefits package We are seeking an experienced Security Application Architect to support the delivery and ongoing evolution of a secure Gateway capability for a strategic UK defence customer . This role combines architectural ownership, secure design governance, and operational assurance within a high-security, mission-critical environment. You'll shape technical direction, drive change, and ensure resilient, compliant solution delivery across engineering and support teams. What you'll be doing; Own and design technical changes required to maintain and enhance Gateway capability Produce high-quality design documentation in collaboration with the customer and Programme Manager Support solution governance and architectural integrity Assist in maintaining secure, resilient and scalable infrastructure components across Windows and Linux environments Support monitoring and investigation of communications platforms such as email and XMPP-based chat, including the ability to review underlying conversation data where required for security analysis Contribute to file validation and inspection processes, ensuring transferred files conform to expected formats and security controls Your technical background;Core Infrastructure VMware/vSphere RHEL & Windows Server Microsoft Services Active Directory , including Group Policy (GPO), DNS integration, LDAP directory structures, and directory management/maintenance Resource management of server platforms and optimisation of system performance Trellix/McAfee security platforms SIEM integration , including syslog creation, forwarding and reporting pipelines Email security standards and protocols Linux & Platform Engineering Experience working within Red Hat Enterprise Linux environments Ability to write scripts to automate operational or security processes Familiarity with pattern matching techniques and regular expressions (Regex) , particularly within security or antivirus tooling Configuration and management of the standard RHEL Firewall Exposure to Linux-based security tooling and antivirus technologies Gateway Technologies Understanding of Gateway appliances and associated software Knowledge of secure communications protocols , including messaging platforms such as XMPP Security & Web Experience supporting file validation, inspection, and content verification within secure transfer environments If you are interested in discussing this Application Security Architect role further, please reply back with a copy of your updated CV.

Role Title: Event Management Consultant Location: Hybrid - 2-3 days per week onsite in Corsham Duration: 6 months Rate £300 per day inside ir35 Active SC clearance required Description We are currently seeking an experienced Event Management Consultant to join a dynamic Hosting and Tooling Team supporting enterprise-level operational tooling and monitoring environments. This role will involve a combination of BAU and project delivery, working alongside Engineers, Analysts, and Consultants to deliver high-quality tooling solutions for secure client environments. Role Responsibilities As an Event Management Consultant, you will: Work directly with client teams, providing technical guidance and operational support. Design and implement event management policies for internal services and client distribution solutions. Provide high-level functional system analysis to support client requirements. Maintain and support operational tooling platforms in line with service deliverables. Contribute to project delivery, collaborating with internal and external Project Managers. Produce technical documentation and architectural diagrams. Build and maintain operational dashboards to support monitoring and reporting requirements. Enhance automation and monitoring capabilities through Scripting and integration. Skills & Experience Successful candidates will demonstrate experience with enterprise monitoring platforms and infrastructure environments, including: Experience managing enterprise tooling such as BMC TrueSight, BMC Discovery, and Splunk (Essential) Agent deployment and management across large environments. Tool installation, configuration, and customisation. SNMP MIB Management. Experience supporting Windows, AIX, and Linux environments. Scripting experience with Python and/or PowerShell. Experience with monitoring tools such as: Zabbix Nagios HP Openview Solarwinds IBM Tivoli Monitoring IBM Tivoli Netcool Strong understanding of networking concepts and protocols. Experience building automation and integrations using APIs (REST). Advanced Splunk expertise, including: Rule creation and advanced logic Splunk Query Language (SPL) SQL coding Dashboard development If this Event Management Consultant role is of interest apply now!

Senior Software Engineer Rate: £450 a day IR 35 Determination: Outside IR35 Location: Bristol Working Pattern: 20% onsite Clearance: SC Clearance required Stack overview: Python (including pytest), git, Docker and AWS with prior experience building full stack Flask You will join a global defence technology consultancy and take ownership of specific software work packages, including low level planning, delivery, and reporting, with ability to work independently and autonomously. You will have strong understanding of microservice software architecture, and design, implement, document and test software modules and components. What you'll bring Strong technical ability with proven experience delivering software components and modules. Ability to work confidently, strategically and autonomously Ability to balance hands-on coding with document writing and planning session participation Your skills and experience: Proficiency in Python (including pytest), git, Docker and AWS with prior experience building full stack Flask applications Experience designing, implementing, and testing software components Knowledge of secure coding practices and cyber security considerations Familiarity with version control and configuration management (Git, AWS) Experience integrating software within larger systems and platforms Understanding of Agile delivery methods Desirable: Experience or knowledge CI/CD pipelines and build tools (GitLab CI, Jenkins, AWS) Understanding and awareness of Machine Learning pipelines Familiarity with containerisation and cloud platforms (Docker, Kubernetes, AWS, Azure) Exposure to additional automated testing frameworks (Selenium, Junit, NUnit) ISTQB Foundation/Advanced or equivalent testing knowledge Experience mentoring early-career engineers Awareness of model-based engineering or architecture tools (UML, SysML)

Senior Software Engineer Rate: £450 a day IR 35 Determination: Outside IR35 Location: Southampton Working Pattern: 20% onsite Clearance: SC Clearance required Stack overview: Python (including pytest), git, Docker and AWS with prior experience building full stack Flask You will join a global defence technology consultancy and take ownership of specific software work packages, including low level planning, delivery, and reporting, with ability to work independently and autonomously. You will have strong understanding of microservice software architecture, and design, implement, document and test software modules and components. What you'll bring Strong technical ability with proven experience delivering software components and modules. Ability to work confidently, strategically and autonomously Ability to balance hands-on coding with document writing and planning session participation Your skills and experience: Proficiency in Python (including pytest), git, Docker and AWS with prior experience building full stack Flask applications Experience designing, implementing, and testing software components Knowledge of secure coding practices and cyber security considerations Familiarity with version control and configuration management (Git, AWS) Experience integrating software within larger systems and platforms Understanding of Agile delivery methods Desirable: Experience or knowledge CI/CD pipelines and build tools (GitLab CI, Jenkins, AWS) Understanding and awareness of Machine Learning pipelines Familiarity with containerisation and cloud platforms (Docker, Kubernetes, AWS, Azure) Exposure to additional automated testing frameworks (Selenium, Junit, NUnit) ISTQB Foundation/Advanced or equivalent testing knowledge Experience mentoring early-career engineers Awareness of model-based engineering or architecture tools (UML, SysML)

2nd Line Wintel Engineer Onsite in Stevenage £40,000 - 44,000 per annum + benefits package High level security clearance As a 2nd Line WINTEL Engineer, you will support and maintain Windows infrastructure in a secure environment, handling customer requests, building and deploying Servers (mainly on VMware), and maintaining documentation, automation, and gold images. You'll carry out patching, upgrades, and system maintenance, resolve incidents within SLA targets, and support data centre activities including physical server builds. The role also involves monitoring capacity, contributing to engineering meetings, ensuring compliance with standards, assisting with testing and projects, and proactively identifying and escalating risks or issues. We're looking for someone with strong technical knowledge and a proactive mindset. Ideal candidates will have experience with: Windows Server 2016, 2019, and 2022 Active Directory, DNS, and WSUS VMware virtualisation Backup technologies (NetApp SAN and Cohesity) Microsoft System Center Operations Scripting and automation Previous experience in a similar 2nd line or infrastructure support role is highly desirable. If you are interested in hearing more about this role, apply now!

Infrastructure Engineer (VMware) - DV Cleared Farnborough (Onsite - 5 days per week) £600-£700 per day (Inside IR35) 6-Month Rolling Contract Overview We are seeking an experienced Infrastructure Engineer to support BAU operations within a secure, high-assurance environment. This role requires strong VMware expertise and an active MOD DV clearance . You will be responsible for maintaining and optimising virtual infrastructure, ensuring high availability, performance, and security across critical systems. Key Responsibilities Administer and manage VMware vSphere environments, including ESXi hosts, vCenter, clusters, and resource pools Design, deploy, and support vSAN hyper-converged storage solutions Configure and maintain HA/DRS to ensure resilient and highly available platforms Manage VMware networking, including: vSwitches and distributed Switches VLANs, port groups, and segmentation Support and maintain VMware Horizon VDI environments (desirable) Develop and maintain automation using PowerCLI , templates, and provisioning workflows Monitor and optimise system performance: Troubleshoot host and VM issues Analyse logs and tune workloads Implement and support backup and disaster recovery solutions: Tools such as Veeam, SRM, or Zerto Apply security hardening practices: VMware baselines Role-based access control Compliance standards Key Skills & Experience Essential: Strong hands-on experience with VMware vSphere (ESXi, vCenter) Proven experience with vSAN deployments and support Deep understanding of HA/DRS configurations Solid knowledge of VMware networking concepts Experience with PowerCLI Scripting and automation Strong troubleshooting and performance tuning skills Experience integrating backup and DR solutions Active MOD DV clearance Desirable: Experience with VMware Horizon (VDI) Exposure to secure or defence environments Additional Information Must be eligible to work onsite in Farnborough 5 days per week Work is conducted in a highly secure environment Immediate start preferred

Key Skills: + Understand Software Lifecycle + C/Python + Aerospace standards including DO-178C Job purpose: We are seeking a Senior Manager, Software Engineering to lead our expanding software team. Reporting to the System Design Manager, you will be responsible for the management and day-to-day activities of the software team, collaborating with other disciplines and managers in all areas of the business. Responsibilities: Team Leadership: Lead the day to day activities of the software team, taking responsibility for delivering the agreed team goals. Skills Development: Develop the team's personal and professional skills, acting as a mentor and coach to the team members. Team growth: Be part of the recruiting team seeking new talent as the team grows. Be accountable for the planning, design, development, verification and integration of the software for the high-altitude, long-endurance aircraft. Act as the technical authority for software, ensuring compliance with safety, performance, and regulatory requirements. Specify and develop the high-level and low-level software requirements Collaborate with other departments including systems engineering, avionics, flight operations and line maintenance for software activities Develop the personal and professional skills of the software team, and taking responsibility for recruiting new talent. Liaise with external authorities including the CAA and external software suppliers Requirements: Bachelor's degree in Systems, Aerospace, Electronics, Computer Science or related engineering discipline. Proven experience as a senior software engineer, technical lead or similar role leading or mentoring a team of software engineers. Experience with creating safety-critical software in C/C++/Ada or similar languages. Expert level familiarity with aerospace standards, including ARP-4761A, ARP-4754A, DO-178C, DO-254A, DO-248, DO-300 and similar standards.

Embedded Software Engineer - SC Cleared C/C++ Embedded Linux/Bare Metal DMA, Interrupts DSP Software Defined radio Rate: £50/hr Duration: Initially 6 months Location: Portsmouth Working pattern: Hybrid, 3 days a week on site Clearance: SC Clearance required You will join a global defence technology company, in a team providing cutting edge technology solutions to our key customers. The role: Use your skills and knowledge to prototype innovative wireless solutions You will be primarily developing using C/C++ on Embedded platforms Development of Embedded software/firmware prototypes in an agile environment Further development of proven prototypes to a deployment standard Development of software in a Real Time Embedded environment using Linux. (eg Microblaze or RISC-V using C/C++) Experience of working with and configuring Embedded Linux systems with tools such as Buildroot and Yocto Experience of working with Uboot, Kernel config and device trees Building and deploying Embedded Linux systems in an offline environment Your skills and experience: Experience programming Embedded Systems using C/C++ Experience of bare-metal and Embedded Linux environments Experience of linux device drivers including DMA, Interrupts, and Device Trees Knowledge of Digital Signal Processing Knowledge of Software Defined Radio

Job Title: SAP SuccessFactors (Employee Central) Consultant Location: Whiteley/Hybrid (2 days per week on site) Rate: £600 per day inside ir35 Contract: 6 months+ SC security clearance is required for this role. Job Description Senior SAP SuccessFactors Employee Central Consultant responsible for supporting, enhancing, and optimising HR solutions within the SuccessFactors landscape. The role involves working closely with business stakeholders to understand HR requirements, identify challenges, and deliver effective system solutions while supporting ongoing ADM delivery within an ITIL framework. Key Responsibilities: Lead configuration, support, and optimisation of SAP SuccessFactors Employee Central. Engage with HR stakeholders to gather requirements, analyse issues, and propose solutions. Provide guidance and support to other SuccessFactors team members. Support integrations, data replication to S/4HANA, and related SF modules where required. Ensure effective ADM delivery aligned with ITIL processes including incident, problem, and change management. Experience required: At least 10 to 15 years of strong hands on in SAP SuccessFactors Employee Central module with very good understanding of HR business processes Excellent communication skills, proactive, client handling skills Able work closely with client, identify HR business challenges/pain areas, analyse and propose right solutions for complex issues Able to guide team other SuccessFactors team members and deliver value to client Experience or knowhow on other SF modules (Time Off, RCM/ONB, ECP, Compensation), replication to S4, SF integrations will be advantageous. ADM delivery experience is preferred with strong understand of ITIL processes and minimum ITIL Foundation certified. If you are interested in this role or wish to apply, please feel free to reply to this advert.

Exchange Specialist (Hybrid Exchange Build) Location: Hybrid - expenses for travel and accommodation in Ireland. Occasional visits to London. Contract: 4-6 months Start: ASAP +Outside IR35 +£500 - £535 a day We're looking for an Exchange Specialist with the technical chops and real-world experience to design and build a hybrid Exchange environment . This is a hands-on role for someone who's done this before and knows the difference between "it works in theory" and "it works in production." You'll be working as part of a project delivery team to implement a secure, scalable hybrid Exchange solution - integrating on-prem Exchange with Exchange Online, ensuring seamless coexistence, mail flow, and identity synchronization. Key Responsibilities Design, build, and configure a hybrid Exchange environment (on-prem + Exchange Online). Lead migration planning and execution for mailboxes, distribution lists, and shared resources. Implement best practices for security, authentication, and compliance (MFA, DKIM, SPF, DMARC, etc.). Work closely with Infrastructure and Security teams to integrate with Active Directory and Azure AD. Troubleshoot complex mail flow and hybrid connectivity issues. Document the environment, configuration, and migration procedures. Provide knowledge transfer and guidance to in-house IT teams. Required Skills & Experience Proven experience designing and implementing hybrid Exchange environments (Exchange 2016/2019 + O365). Deep understanding of Exchange Online, Azure AD Connect, and mail routing . Strong knowledge of PowerShell for automation and administration. Familiarity with M365 security & compliance features. Comfortable working independently and remotely, with occasional travel to Dublin for key project phases. Excellent communication skills - clear, direct, and able to translate tech into action. If you'd like to discuss this Exchnage SME in more detail, please send your updated CV to (see below) and I will get in touch.

UCCE Consultant - SC Cleared + 9 month initial contract + £560 to £625 per day + Hybrid working out of Berkshire + Inside IR35 Key Skills: + UCCE + WxCCE + SC Cleared We are looking for a skilled UCCE Engineer to join our team and take ownership of Cisco Unified Contact Center Enterprise environments. You'll be responsible for designing, implementing, supporting, and optimizing enterprise-level contact center solutions. This role requires a mix of technical expertise, troubleshooting skills, and stakeholder engagement to ensure seamless, resilient, and scalable voice/contact center operations. Key Responsibilities Design, configure, and deploy Cisco UCCE solutions including ICM, CVP, CUIC, CUCM, and Finesse. Manage integrations with third-party systems (WFM, CRM, CTI, SIP gateways, etc.). Monitor and troubleshoot voice infrastructure, ensuring high availability and performance. Perform regular upgrades, patching, and capacity planning. Support end-to-end call flows, routing scripts, and reporting solutions. Create and maintain technical documentation, diagrams, and knowledge base articles. Collaborate with business and IT stakeholders to gather requirements and deliver scalable solutions. Provide tier-3 support for complex incidents and root cause analysis. Ensure compliance with security and data governance standards. Required Skills & Experience Proven experience working as a UCCE Engineer in enterprise environments. Strong knowledge of Cisco UCCE components : ICM, CVP, CUIC, CUCM, Finesse. Proficiency in Scripting and call routing strategies. Solid understanding of SIP, VoIP, and telephony protocols . Experience with CTI integrations and multi-channel contact center solutions. Good troubleshooting skills across network, voice, and application layers. Cisco Webex - WxCCE Familiarity with Windows Server, SQL Server, and Active Directory in a UCCE context. Ability to work under pressure and resolve issues in mission-critical environments. Desirable Skills Cisco certifications (CCNP Collaboration, CCIE Collaboration, or equivalent). Knowledge of Genesys, Avaya, or other CCaaS platforms . Exposure to cloud-based contact centers (Webex CC, Amazon Connect, Five9, etc.). Experience with automation tools, Scripting (PowerShell, Python), or APIs .