Mechanical Commissioning Engineer

Mechanical Commissioning Engineer Data Centre Project – Helsinki, Finland

Location: Finland – site based

Contract type: Freelance / self-employed contractor

Duration: Approx. 6 months (with potential to extend, subject to project progress)

Rotation: 17/4 rotation (17 days on-site, 4 days off)

Start date: ASAP

Rate: Day rate, dependent on experience – competitive and benchmarked to current market for freelance mechanical commissioning engineers on European data centre projects

Right to work: EU passport required

We are seeking skilled and motivated Mechanical Commissioning Engineers to support our client’s data centre project in Helsinki. This freelance opportunity sits within a wider hyperscale programme, working alongside the commissioning management team to deliver high-performance mechanical systems within a live, mission-critical environment. Candidates with prior experience on Microsoft data centre programmes are particularly encouraged to apply.

What You'll Be Doing

• Commissioning Execution: Carry out commissioning activities across mechanical systems including HVAC, hydronic systems, smoke control, and building automation (BAS/BMS), working within the L1-L5 ASHRAE Commissioning framework as per data centre industry standards.
• System Validation: Perform functional testing, calibration, and performance verification of mechanical installations against design and operational standards, under the direction of the Commissioning Manager.
• Troubleshooting & Resolution: Identify issues arising during commissioning and work with engineers and contractors on-site to resolve them in a timely manner.
• Documentation: Maintain accurate test records and commissioning documentation, feeding into reports and supporting handover to the client.
• Team Collaboration: Work closely with the Commissioning Manager and wider project team, providing technical input and progress updates as required.

What You'll Bring

• Experience: Proven experience in mechanical commissioning on commercial, industrial, or mission-critical projects.
• Sector Background: Data centre commissioning experience is essential; prior experience on Microsoft (or other hyperscale) data centre programmes is strongly preferred.
• Technical Knowledge: Strong knowledge of HVAC systems, ductwork, VAVs, hydronics, and BMS.
• Drawings: Ability to interpret mechanical drawings and specifications.
• Problem-Solving: Excellent problem-solving skills and close attention to detail.
• Safety: A strong emphasis on safety throughout all site activities.
• Communication: Confident communicator, able to work independently as part of a wider on-site commissioning team.
• Availability: Available to start ASAP and commit to a 17/4 rotation for the duration of the project.
• Right to Work: EU passport required for this role.