Senior Mechanical Design Engineer in Denham

Denham Martin-Baker is the world’s leading manufacturer of ejection and crashworthy seats, saving over 7,805 lives to date. We combine cutting‑edge engineering with a clear mission: protecting aircrew around the world. We are now recruiting a Senior Mechanical Engineer to join our Mechanical Engineering team at our Denham site.

The Role

As a Senior Mechanical Engineer, you will be responsible for generating robust, compliant, and commercially viable mechanical designs across the full product lifecycle — from concept through development, qualification, production, and in‑service support. You will play a key role in ensuring engineering outputs meet regulatory, customer, and internal requirements while optimising manufacturability, safety, and performance. You will also mentor junior engineers and work closely with cross‑functional teams to deliver high‑quality aerospace systems within demanding technical and commercial environments.

Key Responsibilities

• Check and approve engineering drawings and documents for correctness, functionality, and compliance with best practice.
• Support Integrated Project Teams in defining and delivering all necessary engineering work for new and existing products.
• Translate customer and regulatory requirements into robust engineering specifications.
• Participate in trade studies to identify optimal, commercially viable design solutions.
• Carry out performance and structural calculations using hand methods, spreadsheets, and FEA tools.
• Produce top‑level layouts, 3D models, and detailed engineering drawings.
• Generate and maintain engineering documentation including BOMs, DFMEAs, load/stress reports, tolerance analyses, and CE technical files.
• Support trial installations, customer visits, and design reviews.
• Conduct clearance, interchangeability, retrofit, and modification analyses.
• Identify and drive continual improvement opportunities across products and processes.
• Proactively identify and mitigate risks to safety, performance, quality, and delivery.
• Mentor and support junior engineers.

About You

We are looking for an experienced, proactive, and technically strong Mechanical Engineer with a passion for safety‑critical aerospace products.

Essential

• Degree (1st or 2:1) in Mechanical or Aerospace Engineering (or equivalent experience).
• Strong experience in mechanical design within aerospace, defence, or regulated engineering environments.
• Extensive experience using 3D CAD tools (e.g., NX) and producing high‑quality engineering drawings.
• Strong understanding of materials, manufacturing processes, and design for manufacture and assembly.
• Experience conducting structural and performance calculations including FEA.
• Knowledge of GD&T to UK/US standards.
• Ability to produce and deliver technical reports and presentations.
• Strong problem‑solving skills and sound engineering judgement.
• Excellent communication and stakeholder engagement skills.

Desirable

• Chartered Engineer or working towards CEng.
• Experience with motion simulation tools (e.g., NX Motion, ADAMS).
• Knowledge of aerospace/defence standards (e.g., MIL‑STD, Def Stan).
• Experience in CE certification.
• Hands‑on manufacturing or assembly experience.
• Track record of innovative designs or patents.

Benefits

• 9% non‑contributory pension (18+).
• Midday finish on Fridays.
• 4× salary Life Assurance (18+).
• Personalised training & development plan.
• Healthcare Cash Plan.
• 25 days holiday + bank holidays.
• Option to purchase additional annual leave.
• Cycle to Work & nursery benefits.
• Discounts via the Martin‑Baker+ platform.

Your Interview Journey

• Initial Telephone Interview: A discussion with your Recruitment Business Partner.
• First Stage Interview (Microsoft Teams): Structured technical interview with the Hiring Manager.
• Final Stage Interview: Face‑to‑face interview.

Why Join Us?

At Martin‑Baker, your work directly contributes to saving lives. You’ll be part of a collaborative, high‑performance engineering environment working on safety‑critical aerospace systems with real opportunities to make an impact. This role is subject to UK Government security clearance. Applicants must have the existing right to work in the UK and be currently residing in the UK.