Design and Commissioning Manager

At Mace, our purpose is to redefine the boundaries of ambition. We believe in creating places that are responsible, bringing transformative impact to our people, communities and societies across the globe. To learn more about our purpose, culture, and priorities, visit our strategy site.  Within our consult business we harness our unique combination of leading-edge practical expertise and project delivery to unlock the potential in every project. The project\: We are looking for an experienced Commissioning Manager with a strong electrical background to lead the commissioning of mission-critical data centre projects. This role will see you take ownership of the commissioning process across electrical and supporting MEP systems, ensuring projects are delivered safely, on time, and to the highest technical standards. Our values shape the way we consult, and define the people we want to join us on our journey, they are: Safety first - Going home safe and well Client focus - Deliver on our promise Integrity - Always do the right thing Create opportunity - For our people to excel As a Commissioning Manager, you'll play a vital role in planning, overseeing, and delivering robust commissioning processes on high-profile construction and engineering projects. You'll work closely with our site teams, specialist contractors, and independent witnessing authorities to ensure everything is tested, documented, and handed over exactly as promised.  We're looking for someone with technical expertise, a passion for quality, and the leadership to bring complex systems to life, from factory acceptance to final handover. You will: Manage the full commissioning lifecycle, from planning and risk management to final system sign-off. Act as the go-to expert on all things commissioning, coordinating with project managers, cost managers, consultants, and clients. Develop and maintain commissioning strategies, plans, and trackers aligned with MiCiM's ISO-accredited processes. Attend and coordinate off-site testing and factory witness visits. Guide teams through Level 1–5 testing and sign-off procedures. Proactively manage risks, escalate issues, and identify opportunities to improve delivery. Ensure that safety, quality, and client satisfaction are at the heart of every project. You'll Be Responsible For: Directing the planning, execution, and documentation of commissioning activities for data center projects, with a primary focus on electrical systems (HV/LV distribution, UPS, generators, switchgear, protection, etc.). Overseeing commissioning schedules, method statements, and test scripts, ensuring alignment with project requirements. Coordinating and managing subcontractors, vendors, and commissioning agents. Witness and sign-off functional and integrated systems testing (IST). Ensuring compliance with client specifications, industry standards, and safety protocols. Providing technical input and problem-solving support during project delivery. Working closely with design, construction, and operations teams to ensure a seamless handover. Preparing and delivering detailed commissioning reports and progress updates. You'll need to have: Degree or technical qualification in electrical engineering or a related discipline. Proven experience as a Commissioning Manager or Senior Commissioning Engineer within the data center or mission-critical sector. Strong expertise in electrical systems (HV/LV distribution, UPS, generators, switchgear, protection systems). Knowledge of supporting mechanical systems and controls integration in a data center environment is desirable. Strong understanding of commissioning procedures, safety protocols, and quality standards. Excellent leadership, coordination, and communication skills. Ability to work on fast-paced projects with tight deadlines. Flexibility to work on-site as required. You'll also have: A confident and experienced engineer with a background in MEP systems and project commissioning. Strong leadership skills and a calm, collaborative approach under pressure. Excellent communication and coordination skills, managing multiple stakeholders. A methodical mindset and the ability to refine commissioning programmes in real time. Mace is an inclusive employer and welcomes interest from a diverse range of candidates. Even if you feel you do not fulfil all of the criteria, please apply as you may still be the best candidate for this role or another role within our organisation. We are also open to discussing part time, flexible, and hybrid working options if suitable within the role. #LI-On-site