Hydrogen Systems Mechanical Technician

First Military Recruitment; Hungerford; On-site; GBP 25,000 - 42,000; Full time

Job summary

First Military Recruitment is seeking a skilled Mechanical Technician to support the build, test and commissioning of refuelling equipment in a low-volume manufacturing environment in Hungerford, Berkshire.

You will work from P&IDs and drawings, assemble high‑pressure gas systems and install instrumentation, with a strong focus on safety when handling compressed gases. Ex‑military candidates encouraged; all applications considered.

Qualifications

• Proven experience as a Mechanical or Instrument Technician in a manufacturing or engineering environment.
• Experience assembling high pressure gas systems or similar process equipment.
• Competence in small bore tubing installation and ferrule fittings.
• Ability to read and interpret P&IDs, GA drawings and mechanical schematics.
• Experience supporting pressure and functional testing.
• Strong attention to detail and structured approach to work.
• Clear written and verbal communication skills.
• Experience in hydrogen systems, compressed gases or process plant.
• Knowledge of ATEX environments.
• CompEx certification.
• Experience supporting site installation and commissioning.
• Experience working in low volume or prototype build environments.

Responsibilities

• Assemble mechanical systems and sub assemblies in line with engineering drawings, P&IDs and build procedures.
• Install small bore tubing systems including tube and thread and twin ferrule fittings.
• Mount valves, regulators, pressure vessels and associated pipework.
• Ensure correct torqueing, alignment and mechanical integrity of all assemblies.
• Install and mechanically connect pressure transmitters, temperature sensors, flow meters and other field instruments.
• Interpret P&IDs to ensure correct installation and routing.
• Support loop checks and basic functional verification during test activities.
• Identify discrepancies between drawings and physical build and raise issues clearly.
• Assist with pressure testing, leak testing and functional system testing.
• Record test data accurately and support fault finding activities.
• Diagnose mechanical or installation related issues and implement corrective actions.
• Complete build records, inspection reports and test documentation.
• Maintain traceability of components where required.
• Support quality inspections and audits.
• Contribute to continuous improvement of build processes.
• Work safely with high pressure hydrogen systems.
• Follow procedures relating to pressure systems and hazardous areas.
• Identify and report unsafe conditions.
• Support compliance with relevant UK and EU standards.
• Work closely with engineering, project management and operations.
• Provide practical feedback to engineering based on build experience.
• Support site installation or commissioning activities where required.

Skills

Mechanical assembly

High pressure systems

P&IDs interpretation

Torque & alignment

Hydrogen systems

ATEX knowledge

CompEx certified

Site commissioning

Documentation traces

Job description

First Military Recruitment is seeking a skilled Mechanical Technician to support the build, test and commissioning of refuelling equipment in a low-volume manufacturing environment in Hungerford, Berkshire.

You will work from P&IDs and drawings, assemble high‑pressure gas systems and install instrumentation, with a strong focus on safety when handling compressed gases. Ex‑military candidates encouraged; all applications considered.