Commissioning Manager in Cardiff, Wales

Synergy Mission Critical is a specialist consultancy delivering Commissioning Management, BMS integration, QA/QC, and technical project leadership for Data Centres and Mission Critical environments across the UK and Europe. We support developers, general contractors, and specialist subcontractors with clarity, technical excellence, and dependable delivery in environments that cannot fail.

As we continue to grow across the UK, we are looking for a motivated Commissioning Manager to join our team and develop into a confident, technically capable leader within the commissioning discipline.

Role Overview: The Commissioning Manager will support the planning, coordination, and execution of Commissioning activities across mechanical, electrical, controls, and integrated systems on large-scale Data Centre projects. This role is ideal for someone early in their Commissioning or technical project delivery career who wants structured development, exposure to complex environments, and the opportunity to grow into a full Commissioning Manager role.

Key Responsibilities:

• Commissioning Support
  • Assist in the development of Commissioning plans, scripts, and schedules.
  • Support the coordination of Commissioning activities with contractors, vendors, and client teams.
  • Track progress against commissioning milestones and report updates to senior Cx managers.
  • Participate in witnessing, testing, and verification of mechanical, electrical, and controls systems.
  • Help maintain commissioning documentation, logs, and quality records.
• Quality & Technical Assurance
  • Support QA/QC checks on installed systems, ensuring compliance with design, standards, and project requirements.
  • Assist in identifying defects, tracking close-out actions, and ensuring corrective measures are completed.
  • Contribute to risk reviews, method statement reviews, and technical assessments.
• Project Coordination
  • Attend site meetings, toolbox talks, and Commissioning workshops.
  • Liaise with subcontractors, OEMs, and project stakeholders to ensure smooth execution of Commissioning activities.
  • Support the integration of BMS/controls systems into the wider Commissioning programme.
• Documentation & Reporting
  • Maintain accurate Commissioning records, test sheets, and progress trackers.
  • Assist in preparing Commissioning reports, handover packs, and client documentation.
  • Ensure all documentation is aligned with Synergy's structured delivery approach.

Skills & Experience:

• Essential
  • Technical background in mechanical, electrical, building services, or controls engineering.
  • Strong organisational skills with the ability to manage multiple tasks.
  • Good communication skills and confidence working with contractors and technical teams.
  • A proactive, detail-driven approach with a willingness to learn.
  • Ability to interpret drawings, specifications, and technical documentation.
  • Full Driving license.
• Desirable
  • Experience in Commissioning, QA/QC, or technical project delivery (even at trainee/assistant level).
  • Exposure to Data Centres, critical environments, or large-scale MEP projects.
  • Understanding of BMS/controls systems and integrated testing.
  • CSCS card or relevant site qualifications.

What We Offer:

• Structured development pathway toward Commissioning Manager level.
• Exposure to some of the most complex and high-profile Data Centre projects in the UK and Europe.
• Mentorship from experienced Commissioning and BMS leaders.
• Competitive salary and travel allowances.
• A supportive, collaborative environment where clarity, ownership, and technical excellence are valued.

Who This Role Suits: This role is perfect for someone who is:

• Early in their Commissioning or technical project career.
• Hungry to learn and grow in a high-performance environment and in an exciting and fast growing industry.
• Comfortable being on site and keen to understand how systems come together.
• Motivated by structure, quality, and delivering work that genuinely matters and maintaining relationships with key clients/stakeholders.

Head Office Location: Bristol (projects across the UK)

Why join Synergy Mission Critical? Be part of an exciting start-up journey where your input genuinely shapes how we grow. A varied, dynamic role with no two days are the same. Competitive salary and flexible hybrid working. Opportunities to support and attend industry events across the UK and EU. Modern technology and support for home-office setup. A collaborative, high-performing environment with strong development potential.

Benefits: Company events, on-site parking, hybrid working, flexitime.