Senior System Engineer

00139 LEIDOS INNOVATIONS UK LTD.; Farnborough; Hybrid; GBP 62,000 - 79,000; Full time

Benefits offered by this job

Contributory Pension Scheme

Private Medical Insurance

33 days Annual Leave (including public

Flexible benefits package

Flexi-Time

Job summary

Leidos UK is seeking two Senior Systems Engineers to join our engineering capability. You will work with customers and suppliers to perform SE activities across the full lifecycle, focusing on low level system design and RVTM traceability.

You will collaborate with multidisciplinary teams, manage artefacts, and help define acceptance criteria while navigating both Agile and Waterfall delivery models. A security-conscious, diverse, and flexible work environment is offered.

Qualifications

• Minimum 3 years’ experience in Systems Engineering for IT/software systems.
• Familiarity with frameworks such as ICOSE, NAF, DODAF, MODAF, MBSE.
• Experience with software and hardware IT systems.
• Experience with Agile and Waterfall delivery models.

Responsibilities

• Maintain Requirements Verification Traceability Matrix (RVTM).
• Update artefacts to map to RVTM.
• Review requirements with testers against test cases; identify gaps and mitigations.
• Define and update acceptance criteria; obtain customer/stakeholder agreement.
• Support design of interfaces and document them.
• Version control SE artefacts and interfaces.
• Document and manage V Model activities and artefacts with delivery leads.
• Collaborate with multidisciplinary teams for seamless hardware/software/network integration.
• Document data flow and data matrix views of the system.
• Contribute to the System Concept of Operations Document.
• Track progress of deliverables and dependencies.
• Review and update the SE Management Plan (SEMP) when needed.
• Document governance processes in engineering management.

Skills

Systems engineering

Agile & Waterfall

Education

Bachelor’s degree or suitable experience in Engineering or Technology

Tools

SysML

UML

Cameo

Archimate

Job description

Senior Systems Engineer

UNLEASH YOUR POTENTIAL We are in search of twoSystems Engineersfor our Leidos engineering capability. The successful Systems Engineers will have a full understanding of the principles of systems engineering, will have prior experience as a Systems Engineer involving accepting and integrating software products from suppliers. Everything we do is built on a commitment to do the right thing for our customers, our people and our community. Our mission and our values guide the way we do business. The foundations of our Leidos culture are our Values, Beliefs and Expectations by which we select, recognise and reward employees. They create the environment that drives us toward our mission.

Are you ready for your next challenge? Using your experience in Systems Engineering, you will be responsible for working with customers and suppliers to execute Systems Engineering activities across the full lifecycle, with a focus on the low level system design.

Your role and responsibilities

• Maintain Requirements Verification Traceability Matrix(RVTM).
• Update artefacts (designs and documents) so that they map to RVTM.
• Work with Testers to Review Requirements against Test cases/acceptance criteria, identify gaps, propose solutions and manage exceptions/mitigations.
• Define and update acceptance criteria and get agreement from customer/stakeholders.
• Support the definition and design of interfaces.
• Version Control all relevant SE artefacts and agreed interfaces.
• Document and manage programme V Model activities and Artefacts while liaising with delivery team leads.
• Collaborate with multidisciplinary teams to ensure seamless integration of hardware, software, and network components.
• Document data flow and data matrix views of a system.
• Contribute to Systems Concept of Operations Document through process definition and documentation.
• Track and present progress of deliverables and dependencies.
• Review and Update Systems Engineering Management Plan(SEMP) when needed.
• Document engineering management/governance processes.

Basic Qualifications

• Proven track record with a minimum or 3 years’ Experience in Systems Engineering role for IT/software systems.
• Familiarity in working within at least Systems Engineering Frameworks eg ICOSE, NAF, DODAF, MODAF, MBSE.
• Good working knowledge of Software and Hardware used for IT systems technologies.
• Experience of Systems Engineering within a Software/IT delivery.
• Experience of working within Agile and Waterfall delivery models.
• Excellent analytical, organisational, and communication skills.
• Self-Starter with ability to work with minimal supervision.

Preferred Qualifications

• Bachelor’s degree or suitable experience in an Engineering or Technology subject
• Demonstrated ability to manage multiple priorities and work effectively in cross-functional teams.
• Ideally proficient with system modelling tools (e.g., SysML, UML) and enterprise design software/system modelling (eg Cameo, Archimate).

Security Clearance/Other

• Ability to gain Metropolitan Police Service NPPV2 security clearance (essential).
• Willingness to gain MOD DV (advantageous)

Work location and arrangements

• Work can be done from Home Location.
• Expected to be in the Farnborough office 2 days per fortnight.
• Expected to attend Programme Increment planning 5 Days every 3 months in Leidos Office (Farnborough/Glasgow)
• Ability to attend customer location (Greater London) when needed. Typically, 2 days per month.

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 (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)
• Flexi-TIme

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.

We do provide reasonable adjustments during the application and selection stages. 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

Leidos UK & EUROPE – 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.

Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026.

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 work 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 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.

Pay Range: £61,500.00-£78,800.00 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.

Commitment and Diversity

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.