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

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