Our client, a leading provider of advanced RF and communication solutions for aerospace, defence, and security applications, is currently seeking a Senior Mechanical Engineer to join their team.

• Lead the mechanical design and development of antenna systems and RF equipment
• Perform structural, thermal, and vibration analysis to ensure product performance in harsh environments
• Deliver detailed designs using CAD tools (e.g. SolidWorks, Siemens NX, or similar)
• Conduct and review engineering calculations (stress, strain, fatigue, thermal performance, etc.)
• Support environmental qualification testing (vibration, shock, thermal, IP ratings)
• Ensure designs meet military and aerospace standards (e.g. DEF STAN, MIL-STD)
• Collaborate with RF, electronics, systems, and manufacturing teams to optimise designs
• Lead or support design reviews, technical governance, and documentation
• Provide technical leadership and mentorship to junior engineers
• Support manufacturing, suppliers, and production teams, including DFM/DFA activities
• Participate in root cause analysis and continuous improvement activities

• Degree-qualified in Mechanical Engineering or related discipline
• Proven experience in a senior mechanical engineering role within defence, aerospace, or complex product environments
• Strong background in mechanical design and analysis
• Experience with FEA tools (e.g. Ansys, Nastran, Abaqus)
• Knowledge of environmental and structural requirements for ruggedised equipment
• Experience delivering projects through the full product lifecycle
• Understanding of manufacturing processes (machining, casting, composites, etc.)
• Strong communication skills with ability to engage cross-functional teams and stakeholders

• Experience with RF/antenna systems or electronic enclosures
• Knowledge of IP sealing, EMC shielding, or thermal management
• Experience working to defence/aerospace standards
• Chartered Engineer status (or working towards)
• Experience in a regulated engineering environment
• Security clearance (SC/DV)

• Analytical and detail-oriented engineering approach
• Strong problem-solving and troubleshooting skills
• Ability to lead technical decisions and influence stakeholders
• Effective team collaboration and mentoring
• High level of accountability and quality focus

• Opportunity to work on cutting-edge defence and aerospace technologies
• Collaborative and innovative engineering environment
• Career progression and professional development support (e.g. chartership)
• Employee benefits package

If you are an experienced Senior Mechanical Engineer looking for a permanent role within the defence and security sector, we would love to hear from you. Apply now to join our client''s dynamic and talented team in Marlow, Buckinghamshire.