Commissioning Engineer Recruitment

What the role involves

• Developing commissioning plans, procedures, and punch list documentation, ensuring all systems are covered before energisation or first run and that punch items are correctly categorised and assigned for resolution before handover milestones are accepted
• Leading pre-commissioning checks including loop checks, hydrostatic testing, flushing, and instrument calibration verification, working through a systematic mechanical completion sequence before any energisation or first-run activity is permitted
• Executing systems commissioning in accordance with approved procedures, systematically working through mechanical completion to operational acceptance
• Coordinating with construction, operations, and client teams during handover, managing competing priorities and access requirements
• Documenting commissioning results and obtaining client sign-off at each milestone, maintaining a complete record for the as-built dossier
• Managing commissioning risk and safety during energisation and first-run activities, where consequences of error are most significant

Who employers are looking for

A BEng in Mechanical, Electrical, or Chemical Engineering provides the standard academic foundation. HNC-qualified engineers with substantial site experience are regularly placed in commissioning roles, particularly in process plant, water, and industrial sectors. Commissioning is fundamentally an experience-driven discipline, and the practical knowledge of how systems behave at first-run is difficult to replicate from classroom training alone.

Pharmaceutical commissioning and qualification (C&Q) is a specialist sub-discipline, following ISPE guidance (GAMP 5, baseline guides) and requiring familiarity with DQ, IQ, OQ, and PQ documentation to GMP standards. Pharmaceutical C&Q engineers are in short supply relative to demand, and command a clear market premium. PLC and instrumentation knowledge is expected for process plant roles. BOSIET and HUET certification is required for offshore oil and gas commissioning work. Confined space entry and permit-to-work competency are standard requirements in process plant environments.

Contract rates for commissioning engineers in process industries range from £350 to £600 per day. Offshore commissioning roles attract additional allowances that regularly produce total packages of £70,000 to £100,000 per year.

Mid-career commissioning engineers are expected to manage a systems commissioning scope independently, including planning the sequence of system handovers, coordinating with construction and operations simultaneously, and resolving first-run issues under pressure. Senior commissioning engineers and leads are expected to write the commissioning philosophy and procedures, manage third-party commissioning subcontractors, and provide technical sign-off authority on behalf of the client or project. At this level, client-facing communication skills are as important as technical knowledge.

Pharmaceutical commissioning is categorically different from process plant commissioning in terms of paperwork discipline. Every test, every calibration, and every deviation must be documented contemporaneously and signed by the right authorised person. Engineers who move into pharmaceutical C&Q from other process backgrounds typically need an intensive period of documentation practice before they become productive. The ISPE Baseline Guide series and GAMP 5 are the standard references, and familiarity with these documents is expected before first day on site for an experienced pharmaceutical commissioning hire.

Salary benchmarks

Offshore commissioning roles attract significant allowances, total packages £70,000-£100,000+ are common. Pharmaceutical commissioning and qualification engineers are in short supply and command a premium. Contract rates range £350-£600/day.

Industries that hire Commissioning Engineers

• Power generation: gas turbines, wind, solar, and battery storage, with an increasing volume of renewable energy commissioning work across the UK; battery energy storage system (BESS) commissioning has grown rapidly and requires specific high-voltage and BMS knowledge
• Water and wastewater: treatment works and pumping infrastructure, typically for water companies delivering AMP capital programmes; commissioning engineers here manage handovers across civil, mechanical, and electrical systems simultaneously on large treatment works schemes
• Oil and gas: upstream facilities and refineries, with offshore work common and rotational working patterns standard
• Pharmaceuticals: GMP facility commissioning and qualification (C&Q), following ISPE guidance on DQ, IQ, OQ, and PQ documentation
• Industrial and process plant: greenfield and brownfield projects across chemical, food, and general process industries

Related roles

• Project Engineer: manages programme delivery up to the point where the commissioning engineer takes responsibility for final verification
• Controls Engineer: provides the PLC and SCADA systems that commissioning engineers test and verify during systems commissioning
• Electrical Engineer: provides electrical systems design and installation that commissioning engineers verify during loop checks and energisation
• Systems Engineer: produces the V&V strategy and plans that commissioning engineers implement at system level

Where we place Commissioning Engineer professionals

We place commissioning engineer professionals across the UK. Browse by location or register your CV for roles that match your experience.