Senior Commissioning Engineer

Mott MacDonald is a global engineering, management, and development consultancy committed to delivering impactful work that shapes the future.

We are a team of over 20,000 experts working across the world in more than 50 countries.
We are proud to be part of an ever-changing global industry, delivering transformative work that’s defining our future. It’s our people who power that performance. As an employee-owned business, we invest in creating a space for everyone to feel safe and valued and empowered with the right tools and support. 

Whether you want to pursue excellence in your specialism or broaden your experience with flexible roles across our business, you’ll be connected to a community of global experts championing you to be your best. Join us and shape your story with Mott MacDonald, where everyone has the opportunity to be brilliant.

Job Profile & Description:

About the role

The Senior T&C Engineer will be responsible for planning, managing, and executing testing and commissioning activities for all building and infrastructure systems. The role ensures that all MEP, electrical, and system interfaces are fully tested, compliant with RTA standards, and safely integrated without disrupting ongoing metro operations.

Key responsibilities and duties are listed, but not limited to, below:

1. Testing & Commissioning Planning

• Develop and implement T&C strategies, procedures, and schedules in line with project requirements.
• Prepare method statements, inspection & test plans (ITPs), and commissioning procedures.
• Coordinate testing sequences across multiple systems to ensure efficient commissioning.

2. System Commissioning & Validation

• Lead testing and commissioning of key systems including:
• Electrical systems (LV/MV, lighting, earthing)
• Mechanical systems (HVAC, ventilation, smoke extraction)
• Plumbing and drainage systems
• Fire protection and life safety systems (fire alarm, suppression)
• Building Management System (BMS) interfaces (excluding comms scope)
• Ensure all systems operate as per design specifications and performance criteria.

3. Interface & Integration Management

• Ensure proper integration of new systems with existing metro infrastructure.
• Coordinate closely with civil, rail systems, IT/OT, and MEP teams.
• Manage interfaces in a live operational metro environment, ensuring no impact on existing services.

4. Compliance & Quality Assurance

• Ensure all systems comply with RTA standards, local regulations, and international codes.
• Witness and verify contractor testing, inspections, and commissioning activities.
• Review technical submissions, test reports, and commissioning documentation.

5. Operational Readiness & Handover

• Conduct system performance testing, integrated system testing (IST), and final validation.
• Ensure readiness for safe operation prior to handover.
• Prepare commissioning dossiers, O&M manuals, and handover documentation.
• Support training of client and operations teams.

6. Risk Management & Troubleshooting

• Identify risks related to system installation and commissioning phases.
• Troubleshoot system deficiencies and coordinate corrective actions.
• Ensure minimal disruption to ongoing metro operations during all testing activities.

7. Stakeholder Coordination

• Liaise with RTA representatives, consultants, contractors, and vendors.
• Provide technical support and leadership to T&C teams on-site.
• Ensure effective communication across all disciplines.

• Support continuous improvement and digital ways of working, sharing knowledge and lessons learned.
• Demonstrate safe, ethical and inclusive behaviours aligned to Mott MacDonald values.

Candidate specifications:

Education

• Bachelor’s degree in Mechanical, Electrical, or Building Services Engineering (or related discipline).

Experience

• Significant experience in Testing & Commissioning of MEP/building systems.
• Strong experience in metro, rail, airport, or critical infrastructure projects.
• Mandatory experience working in live/operational environments.
• Proven track record in system integration and commissioning of complex infrastructure projects.

Technical Skills

• Strong knowledge of MEP systems and commissioning processes.
• Familiarity with international standards (ASHRAE, NFPA, IEC, etc.) and local UAE/RTA regulations.
• Experience with Integrated System Testing (IST) and performance validation.
• Understanding of BMS and system interfaces (non-communication focus).
• Ability to review drawings, schematics, and technical documents.

Your benefits and rewards

Our benefits vary by country and are subject to eligibility and local policy. We’ll confirm the details relevant to you as part of the offer process.

• Rewards and bonuses: we are owned by our people (no external investors) and through our employee ownership model success is shared through annual bonus opportunities and longer-term participation as your career grows (subject to local plan, eligibility and business performance)
• Medical insurance and life insurance as per local plan (standard and enhanced coverage may vary by country and policy).
• Annual leave in line with local policy (competitive within the market).
• Maternity leave above and beyond local provisions and paternity leave provisions where applicable
• Professional membership/ institution subscription support
• Learning and career development through project variety, technical networks and structured development opportunities.
• An inclusive culture: we’re committed to equality, diversity and inclusion, and creating a workplace where everyone feels valued and supported.