208 Best national security Jobs in Portsmouth (May 2026)

Systems Engineer

3 days ago

Fareham

Description Systems Engineer Location: Whiteley/Hybrid/Occasional travel to site will be required Clearance Requirements: Current SC clearance, or the ability to gain SC clearance. We are looking to recruit an experience Systems Engineer to support the development of an ATM system. This is an opportunity to work on an exciting programme delivering critical services and infrastructure key to the future of UK Air Traffic Management. The successful candidate does not need to be familiar with ATM (although it would be an advantage) as on-the-job training will be provided as required. The systems engineer will work in a rapidly changing environment, delivering solutions and deliverables of a high quality to wide range of challenging problems. They will work as part of an agile team performing all aspects of systems engineering throughout the development life cycle to meet sprint milestones. The successful candidate will have a full understanding of the principles of systems engineering, will have prior experience as a Systems Engineer on a major programme involving accepting and integrating deliveries from suppliers. Using their experience in Systems Engineering, the successful candidate will be responsible for working with customers and suppliers to execute Systems Engineering activities across the full lifecycle, with specific focus on Model Based Systems Engineering. Required Skills: • Strong experience with architecture modelling tools (e.g. Sparx Enterprise Architect, MagicDraw Cameo), • Strong experience with Architecture Modelling Frameworks and Languages (e.g. TOGAF, MODAF, NAF, SysML, Archimate), • Success in working within large-scale, mission critical and complex integration programmes, • Ability to work with a number of stakeholders and suppliers, working across organizational boundaries as appropriate, • Experience of developing system behavioural diagrams, modelling interfaces and developing models to encapsulate functional requirements, • Demonstrable successes within the System Engineering environment, • Excellent customer facing skills, including being able to ingest large volumes of requirements and information developing clear understanding of customer hot-buttons and needs, • Demonstrable knowledge and cognisance of adjacent disciplines, including programme management, customer relationship management, supplier management and service management, • In-depth experience of conducting detailed systems engineering trade solutions to assess options & feasibility, and define optimal solutions, • Strong knowledge of requirements and user scenario development in both text based and model based approaches, • Understanding designing / delivering systems in a Virtualised Environment, • Experience of working with Service Oriented Architectures Desired Skills: • ITIL including Service Management Roles & Processes, • Knowledge of Air Traffic Management or other safety related systems, • Experience of service management, assurance and regulation requirements and how they apply across functional boundaries, • Willingness to offer fresh, innovative ideas and/or unconventional approaches, • Ability to deliver clear messages through dialogue, written work and formal presentation What we do for you: At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes: * Contributory Pension Scheme * Private Medical Insurance * 33 days Annual Leave (including public and privilege holidays) * Access to Flexible benefits * Flexi Working Commitment to Diversity: We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture. We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources for everyone. If you have a disability or need any reasonable adjustments during the application and selection stages, please let us know, and we will respond in a way that best fits your needs. Who We Are: ___ – we work to make the world safer, healthier, and more efficient through technology, engineering and science. Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation. Working together as Team Leidos we are helping to transform the UK's defence supply chain by providing an integration of a complex mixture of services, at low risk, using a modern suite of systems that will deliver one version of the truth. For the first time, the MOD will see the whole picture, as it is happening. What Makes Us Different: Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world. You can inspire change. Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team. We have been empowering our people to work flexibly for years. Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours. People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that that enhance your future. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. £47,600.00-£61,000.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. About Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit ___. Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at ___. Securing Your Data Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at ___. If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the ___. Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

National security jobs in PortsmouthCreate job alerts

Popular jobs searches in Portsmouth

Popular national security jobs locations