Senior Mechanical Build Technician

An innovative clean energy technology business is developing next-generation power systems designed to support the global transition away from fossil fuels. Working at the forefront of advanced engineering, prototype development and complex system integration, the business is scaling its technical build capability as it moves towards commercial deployment.

We’re seeking a skilled Senior Mechanical Build Technician to join the prototype machining and fabrication team. You’ll take ownership of complex mechanical builds, from tube assemblies and piping systems through to larger engineered systems and facilities installations, bringing practical expertise and initiative to every project.

This role would suit an experienced build technician who thrives working hands‑on with complex systems, enjoys solving technical build challenges, and wants to be part of an innovative engineering environment delivering real-world technology.

• Building and installing complex mechanical systems, pipework and technical hardware independently and as part of a team
• Assembling tube, pipe and valve systems using compression fitting systems
• Supporting the build of larger engineered systems and prototype assemblies
• Installing mechanical pipe runs, valves and associated hardware to engineering drawings and specifications
• Following work instructions and producing build documentation where required
• Maintaining high health & safety standards, including COSHH and risk assessment compliance
• Ordering consumables and supporting efficient management of build materials
• Identifying and resolving practical build issues, feeding back improvements to the Engineering Team
• Supporting facilities upgrades and infrastructure installation projects

• Extensive hands‑on experience building complex mechanical systems
• Mechanical assembly within gas handling, process equipment, aerospace, specialist gas, laboratory or similar technical environments
• Tube, pipe, valve and mechanical system assembly
• Compression fitting systems (Swagelok, Parker, Fitok or similar)
• Reading and interpreting engineering drawings and technical documentation
• Building larger integrated mechanical systems or technical infrastructure
• Strong practical problem‑solving skills within prototype or engineering build environments
• Safe working practices including COSHH, risk assessments and workshop/site safety awareness
• Basic turning and milling experience (desirable but not essential)

• Competitive salary
• Performance bonus scheme
• Share option scheme
• Private healthcare
• Contributory pension
• 25 days annual leave + bank holidays
• Life insurance
• Flexible working hours | 37.5 hrs/week
• Employer‑funded training & development
• Up to 4 weeks contractual sick pay

To find out more or to apply, reach out to Lewis at Cranleigh STEM directly: