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Job Details

Principal Systems Engineer ( R-00084513 )


Systems Engineer



Bristol, Bristol, United Kingdom


Job Description:


At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams in the UK to address some of the most complex problems in defence, government, safety and security, and transportation. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

Are you ready for your next career challenge?

We currently have a permanent vacancy for a Principal Systems Engineer to join our proposal teams to provide technical leadership into all Leidos UK (Defence, National Security, Civil, Air Traffic Management and Central & Devolved Government) bids and proposals.

The Principal Systems Engineer will be responsible for all Systems Engineering related responses to the bids and proposals, including project plans, estimates, requirements derivation & management, outline system architecture & design, systems engineering management plans, trade studies, delivery methodology definition, supplier selection and Model Based Systems Engineering (MBSE) tooling architecture as well as providing technical assurance during internal reviews that the proposals are deliverable. This will include ownership of any specialty engineering aspects (e.g. Safety, ILS) and Business Analyst related aspects.

Applicants must have experience of Systems Engineering Management & artefact generation on various projects, including large scale Systems of Systems / Service Integration programmes (£500M+)

Applicants must have or be eligible for SC Clearance (including having been resident in the UK for 5+ years)

The successful candidate will be required to select appropriate systems engineering tools, methods and strategies in response to the bids and proposals, applying a rigorous and repeatable process to develop the required systems engineering related response material. The successful candidate will also be responsible for maintaining a library of reusable material (documents, diagrams, templates, estimation models etc.) for use in subsequent proposals. To be successful in this role, we are looking for someone who can quickly assimilate large, complex sets of requirements and solutions, provide innovative approaches to integration and testing and work as part of proposal teams to meet tight submission deadlines.


The prime location for the role is flexible with occasional travel to the Farnborough, Southampton, Bristol, Midlands & London areas. Mobility and willingness to travel, on an ad-hoc basis, to 200+ mile distances is essential.

The Role You Will Play:

The successful candidate will have a broad set of experience including a good understanding of various systems engineering methodologies and approaches, from Waterfall to Agile, including DevOps and automation. Using their experience in Systems Engineering, Systems Architecture and/or Management to deliver successful projects and programmes, the successful candidate will create innovative, efficient and effective responses to Systems Engineering related sections in bids and proposals.

Job Description:

  • Creating and presenting storyboards to outline the systems engineering response in the proposals

  • Creating outline Systems Engineering Strategies, including specification of all standards, methods, processes and tools to be used for the full breadth of systems engineering (including specialist areas such as Safety, ILS, HMI/HFI)

  • Creating project schedules for systems engineering, including estimates and justification for those estimates (Basis of Estimates)

  • Reaching out to the wider Leidos systems engineering community for input, examples and references

  • Working with the wider Leidos systems engineering community to stay current with evolving Leidos processes, tools and methods

  • Maintaining a library of example proposal documents, templates, project references, estimating models etc. for reuse in later proposals


  • Significant experience (5 – 10 years) within large scale/systems of systems/portfolio systems integration programmes

  • Significant experience (10-15 years) of systems engineering planning, management and execution, preferably in large scale, complex virtualised and cloud computing environments

  • Success in technical project management leadership, including systems engineering management

  • Extensive background and experience in systems engineering, including exposure to MBSE, engineering management, systems architecture, requirements management, testing, ILS, Safety

  • Significant experience in bids and proposals

  • Comprehensive understanding and demonstrable implementation experience of defining & execution of various systems engineering strategies and methodologies at the portfolio/systems integration level

  • Experience with agile development methodologies

  • Able to use understanding of customer needs and expectations to generate mutually beneficial solutions or alternatives

  • Can deliver clear messages through dialogue, written work and formal presentation

  • Demonstrates commitment to sharing ideas, technologies and best practices

  • Willingness to offer fresh, innovative ideas and/or unconventional approaches

  • Significant experience across a number of broad technology disciplines, including domains such as digital transformation, mission critical, application consolidation, infrastructure design & migration (including Cloud & Data Centre), software development, service integration, and data analytics.

  • Experience of technical management and execution of engineering activities, requirements analysis, implementation planning, third party coordination, integration and test, sustainment, documentation, deployment, and system assessment.

  • Experience of defining processes and solutions for technical platforms, system specifications, system designs, input/output and working parameters for infrastructure and/or software compatibility.

  • Experience of developing and maintaining systems engineering documentation and diagrams/models through use of traditional and MBSE tools.

  • Experience of understanding and leveraging approaches to identify 1) Requirements that represent a gap in capabilities and 2) Opportunities for reuse.

  • Experience of coordinating with enterprise stakeholders to prioritize product backlogs for sprints and releases.

  • Experience of evaluating early designs compared to requirements and oversee systems engineering efforts.

  • Experience of applying strong baseline, configuration and release management.

Desired Skills and Experience:

  • Knowledge of professional engineering practices and best practices for the full development life cycle

  • Experience across 2 or more of the Customer domains Leidos delivers into

  • INCOSE Membership and Certification

  • Experience of delivering into a Service Management organisation

  • Experience of using tools to support planning and tracking of timeboxed or agile approaches

  • Ability to provide clear technical leadership whilst working collaboratively with a wider solution and bid team

  • Strong problem-solving with the ability to work cross-functionally in a fast-paced and rapidly changing work environment

  • Strategic thinker, coupled with an output focused approach to getting the job done – particularly in a bid scenario.

  • Quick learner with an in-depth understanding of the capability

  • Strong knowledge of Service Management and its application to the delivery of successful services.

  • Scaled Agile Practitioner

  • Certified Scrum Master

  • Experience of applying & developing ITIL aspects including Service Management Roles & Processes.

Common Expectations:

  • Works and thinks in a team to deliver a common goal doing what is necessary to ensure mission success.

  • Interface technologies and design.

  • Experience of application architecture, software engineering approaches and languages.

  • Appreciation of security design, tools and their implementation of security within complex system.

  • T-shaped people willing to step outside normal skillsets to support the team; self-starter, proactive learning as required.

  • Identifies potential roadblocks and develops around them.

  • Builds solutions where the solution is not always well defined but always considers the customer first.


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, childcare vouchers and cycle to work scheme)

Pay Range: