Role overview We are seeking an experienced Commissioning (Cx) Manager to join a data centre project in Madrid, Spain. You will lead Level 3 (L3) witnessing across all electrical and mechanical power strings, then carry out point-to-graphics (P2G) verification on the Building Management System (BMS) for each asset. The role suits a hands-on Cx professional who can attend site on agreed dates, witness testing independently and report clearly to the project team.

Key responsibilities
• Attend site on agreed programme dates to witness Level 3 functional testing across all power strings.
• Verify each asset operates to design intent, specification and approved test scripts.
• Carry out point-to-graphics (P2G) checks on the BMS for every asset, confirming points, alarms and graphics match the field equipment.
• Witness and support integrated testing activities, including the heat load testing of the data halls where required.
• Record, track and close out defects and observations with contractors and the wider Cx team.
• Review and sign off L3 test scripts, completed records and P2G checklists.
• Produce clear daily and end-of-visit reports for the project team.
• Work safely in live and energised environments, following site permit-to-work and LOTO procedures. Systems in scope L3 witnessing and BMS P2G cover the following assets across all power strings: Electrical – HV/MV Ring Main Units (RMU), Transformers (Tx) Electrical – LV distribution Automatic Transfer Switches (ATS), Main Busbar LV (MBLV), Main Power Distribution Boards (MPDB), Static Transfer Switches (STS)



Electrical – standby & critical power Generators, Uninterruptible Power Supplies (UPS), Batteries (BATT) Mechanical – cooling Computer Room Air Handlers (CRAH), Cooling Sets, Air Handling Units (AHU), Fan Wall Units (FWU) Controls
- BMS point-to-graphics verification against each asset above Experience and skills
• 5+ years in data centre commissioning, including at least 2 years in a Cx Manager or lead witnessing role.
• Proven L3 witnessing on mission-critical electrical and mechanical plant, ideally on hyperscale or colocation projects.
• Strong working knowledge of HV/LV distribution, UPS and battery systems, standby generation and data hall cooling.
• Hands-on experience with BMS/EPMS integration and P2G verification.
• Confident reading single-line diagrams, cause-and-effect matrices, sequences of operation and test scripts.
• Familiar with Cx management platforms (e.g. Procore, Facility Grid, CxAlloy or similar).
• Clear communicator, able to work with contractors, client teams and multinational crews.
• Fluent English required; Spanish is an advantage. Qualifications
• Degree, HNC/HND or equivalent in Electrical, Mechanical or Building Services Engineering.
• Recognised Cx certification (e.g. CDCP, BCxA, ACG or similar) is desirable.
• Valid site safety card (e.g. SMSTS, SSSTS or CSCS) or local equivalent.
• Authorised Person (AP) or HV awareness training is an advantage.
• EU right to work, or the ability to work in Spain via an appropriate contracting route If this is something which you would be interested in, please message directly or apply via the website

📌 Commissioning Manager (Madrid)
🏢 Pentagon Technical Services
📍 Madrid