Testing & Commissioning Engineer - Mechanical in City of Westminster

We are seeking experienced Mechanical Testing & Commissioning Engineers to support the delivery of HS2, one of Europe's largest and most complex rail infrastructure programmes. The role will be responsible for the safe planning, execution, and assurance of testing and commissioning activities for electrical systems, ensuring compliance with HS2 Technical Standards, statutory requirements, and project‑specific employer's requirements. You will be accountable for the management of all completed assurance documentation which is validated and processed in the proprietary document control procedure. The post holder will work within a multi‑disciplinary commissioning team and play a critical role in supporting system integration, staged hand‑over, and readiness for trial operations. This is a key role within the SCS MEP team in supporting the requirements of testing and commissioning through the delivery of the MEP works.

Mechanical & Electrical Systems Responsibility

• HVAC systems (AHUs, FCUs, VRF, chilled water, heating systems)
• Ventilation systems (station, tunnel, smoke control, and pressurisation systems)
• Public health systems (cold water, hot water, drainage, pumped systems)
• Fire suppression systems (sprinklers, mist, dry/wet risers – mechanical scope)
• Mechanical plant rooms
• Pumps, pipework, valves, and controls interfaces
• Interface with BMS for mechanical systems commissioning

Additional Responsibilities

• Managing the development of Test Documentation by the suppliers and execute electrical testing and commissioning activities in line with the HS2 Commissioning Strategy.
• Confirming, before the works of the T&C specialist commence on site, that the following activities have been carried out:
• Scope of Works.
• Construction drawings and specifications issued (in accordance with the SCS LOD5 Design Management Plan).
• Notice to Start issued to the T&C specialist.
• Interface arrangements agreed with other package managers.
• Completion / commissioning / handover milestones agreed.
• SHE requirements e.g. RAMS, COSHH assessments, training records, competency cards, etc in place.
• SHE documentation issued to any subcontractor and acknowledged.
• Quality risk review completed for critical activities.
• Pre‑commissioning checks complete.
• Commissioning Test Plans approved.
• Support energisation, system proving, and staged commissioning activities.
• Ensure the progress of the testing and commissioning of the works are in accordance with the contract, programme, budget and client requirements.
• Implementation and assure compliance with all relevant HS2 and/or statutory requirements with regards to Health, Safety, Environment and Public relations within the scope of work.
• Support Package Managers with delivery associated with the commissioning process.
• Ensure contemporaneous records of work done are maintained by the subcontractor, issued for review (or acceptance).

Essential Qualifications

• Experience in involvement of a major infrastructure project, ideally from design through to hand‑over.
• Experience in a similar leadership role responsible for the delivery of testing and commissioning and systems integration activities.
• Strong leadership, communication, and conflict‑management skills.
• HNC / HND / Degree in Mechanical Engineering or a related discipline.
• Relevant commissioning experience in engineering or other regulated industry.
• Strong understanding of electrical safety, testing standards, and commissioning processes.
• Experience producing and managing commissioning documentation and hand‑over packs.

Desirable Qualifications

• Experience of test and commissioning and integration on a major rail project.
• Framework and Alliance behaviours: persuasive, socially optimistic, democratic, adaptable.
• Experience of early contractor involvement models and NEC forms of contract.
• Knowledge of UK Building Regulations, British Standards, and CIBSE commissioning guidance.
• Expert knowledge of products, construction details and relevant rules, regulations, and quality standards.
• Hands‑on attitude.
• Experience of a self‑assurance contract environment.
• Proof of meeting minimum job criteria and person specification in application and pre‑interview stage.

Benefits & Salary

Salary Competitive with excellent benefits package. HS2 is the UK's new high speed rail network, creating economic growth across Britain and connecting major cities. We welcome a diverse workforce and encourage applicants from all backgrounds.