DESCRIPTION. You are a Principal Engineer - Systems Engineering (Model Based Architect) at BAE Systems Submarines.The Role:We are seeking an experienced engineer to design and maintain requirements, architectures, and system designs for complex technical systems. This includes generating SysML views to capture interactions between complex systems within the submarine. The successful candidate will also support the full utilisation and development of model-based systems engineering artifacts across a portfolio of products.Key Responsibilities:* Design and maintain requirements, architectures, and system designs for complex technical systems* Generate SysML views to capture interactions between complex systems within the submarine* Support with the full utilisation and development of model-based systems engineering artifacts across a portfolio of products* Expand, elaborate, and own key system design elements and associated systems engineering products that drive customer success* Work with cross-functional teams to define system functions, requirements and design elements to ensure optimal performance in constrained technical environments* Decompose complex designs into understandable components for further elaboration and development* Support the execution of the full project lifecycle, from planning, through implementation, to operational readinessRequirements:* Hold a Degree or equivalent within a STEM field* Have a strong familiarisation of SysML* Experience of using Model Based System Engineering toolsets such as Enterprise Architect* Firm understanding of Systems Engineering and Systems thinking* Familiarity with the Engineering System Lifecycle and its related process (specifically processes mentioned ISO/IEC 15288)Benefits:You'll receive benefits including a competitive pension scheme, enhanced annual leave allowance and a Company contributed Share Incentive Plan. You'll also have access to additional benefits such as flexible working, an employee assistance programme, Cycle2work and employee discounts - you may also be eligible for an annual incentive.The Team:This is a fantastic opportunity to work collaboratively on a model-based systems engineering approach for the first time on a submarine platform. You will play a key part in how we bring various complex systems together to support whole boat operations. You will be involved in one of the biggest and most expensive programmes within the United Kingdom and have fantastic room for career growth and progression within the role. We offer relocation support packages across all Submarines roles, subject to meeting eligibility criteria.Why BAE Systems?:This is a place where you'll be able to make a real difference. You'll be part of an inclusive culture that values diversity, rewards integrity, and merit, and where you'll be empowered to fulfil your potential. We welcome candidates from all backgrounds and particularly from sections of the community who are currently underrepresented within our industry, including women, ethnic minorities, people with disabilities and LGBTQ+ individuals. We also want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments.Please note that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation.