Job Title: Principal Mechanical Design EngineerSalary: Competitive, dependent on experience Location: Stevenage Hybrid Working: Typically 2-3 days per week on-site to meet programme needs Security Requirements: Applicants must be a British Citizen or a dual national including British citizenship. Nationality and right-to-work restrictions may apply. Successful candidates will need to obtain BPSS security clearance as part of the onboarding process.What we offerAnnual bonus: Up to 2,500, based on company performancePension: Up to 14% combined employer/employee contributionOvertime: Paid overtime opportunities availableFlexible leave: Up to 15 additional flexi days per yearFlexible working options: Open to applicants seeking adaptable working patternsAbout the roleWith an expanding project pipeline, we are seeking Principal Mechanical Design Engineers to contribute across all stages of the product lifecycle-from early conceptual studies and detailed design through to qualification, production support and in-service engineering.You will play a key role in leading mechanical design solutions for a variety of complex defence products, working closely with multidisciplinary engineering teams.This role also offers strong potential for future career development and progression.What we''re looking forQualification to Degree/HND/HNC level in a relevant discipline, along with substantial mechanical design experienceProven ability to lead design work packages and operate effectively wi