Description We Need You...Join Our Talent Community:Leidos UK & EUROPE are always on the lookout for talented individuals to join our company and would love to hear from you. If you cannot see a vacancy on our careers page that matches your current requirements, please register your interest in Leidos UK & EUROPE, by submitting an application via 'Join Our Talent Community' on the UK careers page and we will be in touch as soon as a role matching your skill set becomes available.The Role:Due to growth within UK programmes, we will need talented Systems Engineers throughout the course of 2026...You will have a full understanding of the principles of systems engineering and have prior experience as a Systems Engineer on a major programme involving accepting and integrating deliveries from suppliers.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 specific focus on Model Based Systems Engineering (MBSE).Location:Future vacancies could be available in Bristol, Farnborough or Whiteley (Hampshire).Key Responsibilities:Working with operational stakeholders, technology suppliers and architects to refine system and sub-system requirements and acceptance criteria Allocation of requirements to lower-level components, conducting technical derivation analysis as required Modelling of functional and non-functional requirements and scenarios using MBSE and architectural framework approaches Modelling operational, business and system designs & behaviours within architectural views Managing compliance assessments at system and lower levels Maintaining the high-level design and overseeing development of lower-level designs Producing detailed engineering artefacts such as: High and Low Level Designs Interface Control Documents (ICDs) / Application Programming Interfaces (APIs) Compliance Reports Preparing for and delivering milestone tec