Mechanical Project Manager in Eastleigh

Lead the safe, compliant, on-time and cost-effective delivery of mechanical works across multiple hyperscale data centre projects in live, business-critical environments.

Own delivery from scope and planning through installation, testing, commissioning and handover. Manage project governance, technical delivery, stakeholders, subcontractors, programme and commercial performance.

Key Tasks & Responsibilities

Scope, Planning & Client Requirements

• Develop and agree mechanical scopes with clients and internal stakeholders.

• Develop and maintain project programmes, delivery plans, resource plans, trackers and risk registers.

• Ensure delivery aligns with contract requirements, client expectations and site constraints.

• Maintain accurate labour forecasts and resource information.

• Identify programme risks, dependencies and mitigation actions.

• Support the Commercial team with variations, additional works and change control.

Mechanical Project Delivery & Governance

Manage mechanical delivery from mobilisation to handover, including:

• Design review, feasibility and buildability.

• Pre-construction planning and mobilisation.

• Installation and subcontractor management.

• Testing and commissioning.

• Practical completion, snagging and close-out.

• O&M documentation and handover to BAU.

Ensure project SOPs, workbooks, quality procedures and governance requirements are followed and evidenced.

Provide regular reporting covering:

• Programme and milestone progress.

• Labour and resource performance.

• Risks, issues and mitigation.

• Changes and commercial impacts.

• Testing, commissioning and handover readiness.

Health, Safety, Compliance & CDM

• Ensure compliance with UK H&S legislation, CDM requirements and OCS policies.

• Ensure RAMS, Permit to Work, isolations and change-control processes are in place and followed.

• Manage risks associated with temporary works, interfaces, access and concurrent activities.

• Ensure mechanical works are safely planned and delivered within live operational environments.

• Lead toolbox talks, safety briefings, inspections and incident/near-miss actions.

• Challenge unsafe or non-compliant practices and ensure corrective actions are closed.

Mechanical Technical & Commissioning

• Review and challenge mechanical designs, specifications and installation methodologies.

• Assess buildability, maintainability, operability and compliance.

• Identify changes required to protect safety, programme and operational performance.

• Plan and coordinate mechanical testing and commissioning.

• Support FAT, SAT and Integrated Systems Testing (IST), where applicable.

• Manage technical decisions through formal change control.

• Ensure test records, commissioning documentation, O&M manuals and handover information are complete.

• Support client training and operational transition.

People & Stakeholder Management

• Coordinate and provide direction to Project Managers, Supervisors and mechanical delivery teams.

• Set delivery standards and address performance or capability gaps.

• Coordinate mechanical activities with site leadership and other disciplines.

• Manage interfaces with clients, consultants, suppliers and subcontractors.

• Maintain accurate programme and delivery information.

Commercial & Subcontractor Management

• Support financial accountability, forecasting and margin protection with the Commercial team.

• Monitor subcontractor performance against scope, programme, quality, safety and commercial requirements.

• Manage subcontractors from mobilisation through close-out.

• Identify value-engineering opportunities without compromising safety, compliance or operational readiness.

• Maintain records supporting audits, claims, variations and contractual compliance.

• Identify and escalate commercial risks.

Qualifications, Skills & Experience

Essential

• Extensive experience in mechanical project or delivery management.

• Proven experience delivering mechanical services in complex, live or business-critical environments.

• Data centre, critical infrastructure or mission-critical experience strongly preferred.

• Experience managing multiple mechanical workstreams or packages.

• Strong understanding of mechanical building services, installation, testing and commissioning.

• Experience managing project programmes, resources, risks and delivery trackers.

• Proven contractor and subcontractor management experience.

• Good knowledge of UK H&S legislation and safe systems of work.

• Practical CDM experience.

• Experience working in live operational environments.

• Experience with project governance, quality assurance and change control.

• Strong written and verbal communication skills.

• Strong stakeholder management and client-facing experience.

• Competent with Microsoft Office and Microsoft Project.

Desirable

• Hyperscale or Tier III/Tier IV data centre experience.

• Mission-critical commissioning and IST experience.

• Mechanical engineering qualification or relevant apprenticeship.

• SMSTS, SSSTS or IOSH.

• Relevant mechanical services qualification or professional membership.

• BIM, digital project management or electronic commissioning/handover experience.

• Experience with variations, change control and project forecasting.

Working Arrangements

• Location: UK-wide, with regular travel to client and project sites.

• Working environment: Predominantly site-based within live data centre environments.

• Hours: Standard project hours, with extended hours, weekends and out-of-hours working where required for commissioning, shutdowns or programme delivery.

• PPE: OCS corporate PPE and site-specific PPE requirements apply.

• Site access: Subject to client security, induction and compliance requirements.

OCS UK & Ireland is a leading facilities management company with 50,000+ colleagues and a turnover in excess of £2bn. We deliver innovative, award-winning services within facilities management, hard services, cleaning, security and catering.

Our mission is to make people and places the best they can be for our colleagues, customers and the communities we serve. Our commitment to doing business the right way is rooted in our TRUE values - Trust, Respect, Unity, and Empowerment.

Why Work for OCS?

✅Award-Winning Employer: Ranked 36th on Glassdoor’s Best Companies to Work For 2025 — we value and motivate our people.

🚀Digital Learning: The OCS Academy offers digital courses and resources to help you build skills and grow your career.

🙂 Retail Perks With our Hapi app, you can gain access to exclusive discounts, rewards and wellbeing resources.

📝Professional Growth: 600+ live learners across UK&I — Empowering colleagues with further development and qualifications!

💰Flexible Pay: Access a portion of earned wages before payday with our Wagestream App! (Contract Specific)

If you are interested in joining a business that encourages professional development, career progression and the chance to work with inspirational people then please click apply and register your interest! You can also sign up to our job alerts when registering which will notify you when other suitable vacancies are available.

We are an equal opportunities employer and rely on a diverse workforce with a broad range of knowledge, skills, and backgrounds to deliver our goals. We offer an inclusive and welcoming environment and actively encourage applications from all individuals regardless of race, gender, nationality, religion, sexual orientation, disability, or age.

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