The Opportunity

We are seeking a high-caliber Senior Mechanical Commissioning Engineer to lead and grow our commissioning team for major Data Centre projects across Sweden. You will ensure a structured, auditable, and high-standard approach to the commissioning process, verifying that all installed M&E services operate exactly as designed.

This is a critical role responsible for the transition from construction to live operations in a high-uptime environment.

Key Responsibilities

• Leadership: Supervise engineers and third-party contractors to ensure safe, compliant, and accurate testing (L2-L5).

• Documentation: Author and review Commissioning Scripts, SOPs, and Safe Systems of Work (SSoW) for all mechanical activities.

• Planning: Lead onsite activities, including progress meetings, coordination with working parties, and ensuring all test equipment is calibrated and ready.

• Execution: Lead pre-start briefings and witness testing through to client acceptance/handover.

• Problem Solving: Identify technical defects or deviations from design intent, raising issues with the National Commissioning Manager to find rapid resolutions.

• Collaboration: Work closely with Project Management and Statutory Authorities regarding plant start-up and cooling integration (including potential heat-export systems).

• FAT/SAT: Attend Factory Acceptance Testing with clients as the technical lead for mechanical plant.

Technical Specification

• Expertise: Deep technical knowledge of Mechanical services, including CHW loops, CRAC/CRAH units, pumps, valves, pipework, and complex HVAC systems.

• Standards: Strong understanding of commissioning levels (L2 through L5) and industry-specific standards (e.g., Uptime Institute or ASHRAE).

• Integration: Solid grasp of how mechanical plant interacts with BMS/EPMS and electrical standby power systems.

• Methodology: A logical, step-by-step thinker capable of breaking complex system tests into manageable, progressive workflows.

Candidate Requirements

• Experience: Minimum 5 years of professional experience as a Commissioning Engineer specifically within Data Centre environments.

• Soft Skills: Exceptional communication skills to manage client witnesses and lead diverse site teams.

• Technology: Proficient in design review and reporting technologies.

• Language: Professional English is required; Swedish language skills are a significant advantage.

• Mobility: Ability to work on-site in Sweden for the duration of the project phases.

Darwin Recruitment is acting as an Employment Business in relation to this vacancy.

Wesley Cann

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