Adept:us is recruiting a Principal Systems Engineer for a Bristol-based client specialising in delivering technical excellence and high-value solutions to complex engineering challenges in the aerospace sector. Due to a strong reputation and proven delivery excellence, our client has secured several major projects, creating the need to expand their systems and safety capability. The Role The Principal Systems Engineer will play a key technical role in the development of multiple aerospace systems and equipment, contributing across the full systems engineering lifecycle. The role involves requirements development, functional and architectural design using MBSE methods, verification and validation activities, and detailed technical input at system and equipment level. The position requires close collaboration with internal engineering teams and client stakeholders to ensure high-quality, on-time delivery of technical outputs, while upholding the highest standards of engineering excellence and integrity. Essential Skills and Experience Proven experience in aerospace systems and/or equipment design Strong knowledge of equipment manufacturing processes Solid experience in requirements engineering Experience in systems or product architecture definition and design Knowledge of verification and validation methods Strong understanding of systems engineering processes, including ARP 4754A and ARP 4761A Extensive experience in system and/or equipment design within an aerospace e