Principal Systems Engineer

Principal Systems Engineer (Mechanical/Electrical/Process Systems) Location: Hybrid - Derby Office attendance 2/3 days per week Contract Duration: 12 months Rate: £65 Per Hour Inside IR35 Are you a Systems Engineer with experience in mechanical, electrical, and process systems in highly regulated industries such as nuclear, aerospace, or defence? We are looking for a Principal Systems Engineer to join a dynamic contract team delivering defence and decommissioning projects. You will work in a fast-paced, technically challenging environment, bridging complex systems, leading interface management, and delivering robust, compliant solutions. Key Responsibilities Produce, manage, and verify system requirement specifications. Lead interface management across mechanical, electrical, and process systems. Define system architecture and perform functional and interface modelling. Work closely with multi-disciplinary teams to ensure system designs meet operational and regulatory requirements. Maintain and operate requirements management software (DOORS preferred). Apply Model-Based Systems Engineering (MBSE) tools such as Capella (desirable). Essential Qualifications & Experience Degree in Engineering or STEM subject (or equivalent demonstrable experience). Experience in highly regulated industries - nuclear, aerospace, or defence. Strong foundation in mechanical or electrical engineering. Experience with systems thinking and systems engineering processes. Competence in producing technical documentation, managing system interfaces, and supporting design decisions. Desirable Skills Prior exposure to the nuclear sector. Systems Engineering qualifications/training. Practitioner experience with Rationale DOORS. Familiarity with MBSE and INCOSE/BS standards. Experience transitioning from core engineering into systems engineering roles. Please note that this role will require UK Security Clearance. Apply Now: Call Chloe on (phone number removed) or email (url removed) to take the next step in your career