Commissioning Engineer (Mechanical)

We are looking for an experienced mechanical commissioning professional to coordinate mechanical and integrated commissioning on a major data centre project in Seinäjoki. You will support delivery from design and construction readiness through testing and final handover, coordinating with contractors, vendors, the project team and client to ensure mechanical systems are fully tested and all Level 0–5 commissioning and turnover documentation is complete. **Key Responsibilities** **Planning, Design & Coordination** - Develop commissioning activities within the project programme, aligned with stakeholder and contract requirements. - Review the issued-for-construction design and report commissioning risks, opportunities, scope gaps and programme impacts. - Coordinate mechanical readiness reviews before start-up and testing, confirming completion, QA/QC records, RAMS, permits, access, isolations, controls, temporary requirements and vendor attendance. - Provide commissioning input at coordination, design, integration, discipline, OFCI and CFCI meetings. **Technical Reviews & Commissioning Controls** - Review and comment on technical submittals, RFIs, vendor test scripts, commissioning RAMS and related commissioning documentation. - Review contractor and vendor test packs against the design, employers requirements, approved submissions and applicable standards. - Attend factory tests and complete site or vendor QA/QC inspections against approved requirements. - Manage commissioning records, evidence, approvals and reporting in SharePoint, EIDA and project platforms. **Testing, Integration & Performance Verification** - Witness field testing and commissioning activities, record results and report defects, deviations and incomplete works. - Coordinate CFCI and OFCI vendors and track commissioning progress from Level 0 to Level 5. - Coordinate with the integration team to capture programme crossovers, dependencies, deliverables and beneficial-use areas. - Analyze functional performance logs and monitoring data with the BMS contractor and other specialists to verify system performance. **Management, Reporting & Quality** - Provide discipline updates at weekly commissioning meetings and close assigned actions promptly. - Monitor construction progress with the mechanical, electrical and CSA discipline leads to identify scope gaps, missed opportunities and risks arising from programme variance. - Maintain a daily commissioning diary and issue a concise weekly report in the agreed project format. - Review mechanical commissioning certification and submit traceable evidence for authorized approval. **Turnover & Handover** - Coordinate mechanical turnover packs at each commissioning level, verify supporting evidence, and prepare EIDA forms for authorized approval. - Support integrated systems testing, client witnessing, demonstrations, operator training and final transition to operations. **Commissioning Scope** - Mechanical plant and systems, including chillers, cooling towers or dry coolers, pumps, heat exchangers, ventilation systems, fuel systems where applicable, water-treatment systems, drainage and associated controls. - BMS interfaces, control sequences, alarms, trends, functional performance testing and integrated operation. - Mechanical interfaces with electrical systems, fire alarm, life-safety systems, utilities and specialist vendor packages. - Factory and site testing, flushing, pressure and leak testing, balancing, start-up, functional, failure-mode and integrated systems testing. - Digital commissioning records, tagging, test packs, certification, turnover dossiers and final handover evidence. **Qualifications & Experience** - Mechanical, Building Services or related qualification, with 5+ years commissioning experience on large industrial, mission-critical or data centre projects. - Proven ability to plan, manage and execute full integrated systems testing, including development and completion of IST documentation on a digital platform. - Thorough understanding of Finnish and European building regulations, standards, codes, commissioning practices and mechanical system integration requirements. - Strong organization and prioritization skills, with a record of meeting deadlines and budgets. - Strong communication and reporting skills with clients, contractors, vendors and project management. - Demonstrated ability to coordinate contractors, vendors and multidisciplinary interfaces while maintaining collaborative working relationships. **What We Offer** You'll play an important role in commissioning the mechanical systems of a major data centre project in Seinäjoki, working closely with contractors, vendors, and multidisciplinary project teams to ensure systems are tested, verified, and ready for operation. From design reviews and construction readiness through functional testing, integrated systems testing, and final handover, youll