Proof Operative

Join us on this mission as a Proof Operative within the friendly and supportive Operations department, based in Chalgrove, Oxfordshire. This role will be a shift role that will require you to work 4 days on and 4 days off with the hours 07:00 – 16:30. Please note the shift pattern will start at the beginning of 2026 and will include a shift allowance. Before the shift begins you will be working our regular hours of 08:00 – 16:45 Monday to Thursday and 08:00 – 12:00 on Fridays.

What You’ll Be Doing

• The Proof Operative role is responsible for undertaking a variety of processes including pyro proofing of pyrotechnic devices for the department.
• Identification of Proof Chamber Parts to drawing.
• Assembly and disassembly of Chambers assemblies.
• Cleaning of Chambers and detail components.
• Set up appropriate firing mechanisms.
• Load Cartridge/ Rocket Motors.
• Arm Cartridge/ Rocket Motors.
• Fire Cartridge/ Rocket Motors.
• Collect and analyse firing data.
• Work to correct QAI’s, Tech Notes and Identification of Correct drawings.
• Updating SAP.
• Safe using of ovens and freezers and programming of conditioning chamber timers.
• Pressure testing of proof chambers.

The future of engineering and manufacturing is changing. To future-proof your career Martin-Baker will always keep investing in your development. That’s a long-term promise. Because we want to learn from you, so keeping your skills up to date is important to us, and important for our future. We’re after people who are curious and enjoy solving problems. We’re a company that saves lives. Join us.

Characteristics & Skills

• Basic understanding and interpretation of engineering drawings.
• A completer finisher – i.e. someone who always finishes off a task with no loose ends.
• Comfortable working under time pressures to balance priorities to agreed deadlines.
• Team player with the ability to work independently.
• Experience in H&S policies and procedures.
• Good standard of education with strong GCSE grades.

At Martin-Baker you’ll have the opportunity to work alongside experts who will help you to obtain a wide understanding of an engineering business, and you’ll develop new skills and gain a strong industry experience.

Your Benefits In Detail

• Highly competitive 9% non-contributory pension scheme (18+).
• 4x salary Life Assurance (18+).
• Lunchtime finishes every Friday.
• Personalised training and development plan.
• Healthcare Cash Plan.
• 25-days annual leave plus bank holidays.
• Opportunity to purchase additional annual leave.
• Cycle to work scheme (following qualifying period).

We believe in equal opportunity. We are committed to creating an inclusive environment where everyone is respected. We want you to be able to do your best work. Martin-Baker is a signatory to the Armed Forces Covenant, showing our support and commitment to our Armed Forces and their families, proudly supporting those who serve. All candidates will be treated equally and fairly, regardless of their background, or any characteristic protected by law. Candidates will be selected entirely on their skills and competencies and in alignment with each role’s specifications and/or requirements. All published adverts will be aligned with the Company’s Diversity and Inclusion commitment.

For all successful candidates, Martin-Baker will undertake background BPSS security checks. As part of this, we will need to confirm your identity, employment history and address history to cover the past five years as well as your nationality, immigration status and criminal record. For positions that require Security Clearance, the successful candidate must hold or be willing to obtain security clearance up to the relevant level for the role.