Commissioning Engineer Mechanical

About AESG

AESG is an award-winning Specialist Consultancy, Engineering, and Advisory Firm with headquarters in London, Riyadh, Singapore, Dubai, Cape Town, Cairo, and Sydney. The firm operates throughout the Middle East, Europe, and Asia. AESG's expertise spans four core verticals: Building Engineering, Planning and Infrastructure, Strategy and Advisory, and Commissioning, Handover and Asset Management. The company maintains one of the largest dedicated teams with extensive experience in sustainable design, fire and life safety, cost management, façade engineering, commissioning, building performance, waste management, environmental consultancy, carbon management, and acoustics.

Role Overview

AESG is seeking a Commissioning Engineer Mechanical to join its team in Riyadh, Saudi Arabia. This full-time role involves conducting site inspections and verifying test results as part of a multi-discipline project team. The Commissioning Engineer will provide essential commissioning services, ensuring they align with AESG's established high standards.

Key Responsibilities

• Perform site inspections and witness testing of mechanical systems, including chilled water systems, HVAC equipment, AHUs, FCUs, CRAH/CRAC units, cooling towers, pumps, ventilation systems, plumbing, public health, and fire protection systems.
• Review technical documentation such as drawings, sequences of operation, equipment schedules, method statements, testing procedures, and commissioning plans for compliance with project specifications and industry standards (*, CIBSE, ASHRAE, BSRIA).
• Verify installation readiness, including pipework, supports, insulation, labelling, accessibility, maintainability, and system completeness before testing.
• Witness and verify pre-commissioning activities, including pressure testing, flushing, cleaning, water treatment, equipment start-up, and system readiness inspections.
• Validate system performance by reviewing flow rates, temperatures, pressures, control sequences, setpoints, TAB results, and equipment operation against design intent.
• Coordinate with contractors, TAB specialists, controls/BMS engineers, OEM vendors, and other stakeholders to plan testing, resolve technical issues, and ensure system readiness.
• Monitor commissioning progress, maintain commissioning trackers, deficiency logs, and readiness reports, and support program delivery.
• Prepare high-quality site observation reports, commissioning records, technical comments, non-conformance reports, and punch lists.
• Participate in commissioning meetings, technical workshops, and coordination sessions, providing input on system readiness, technical risks, and program constraints.
• Support functional performance testing, integrated systems testing, and verification of mechanical system interfaces with electrical, controls, fire protection, and life safety systems.
• Review TAB reports, water quality results, O&M manuals, as-built documentation, training records, and handover documentation prior to project completion.
• Ensure all commissioning activities adhere to project procedures, health and safety requirements, quality standards, and industry best practice, while representing AESG professionally.

Required Experience and Skills

• A minimum of 5-10 years of experience in a relevant field.
• Demonstrated technical knowledge and expertise to undertake intricate tasks and solve practical problems.
• Excellent communication and listening skills for effective collaboration across departments and with clients.
• Ability to independently represent the company in a client-facing role and manage client satisfaction.
• Proven time management and planning skills to monitor progress and prioritize tasks effectively.
• Demonstrated industry experience on a wide range of related project types and ability to manage project deadlines efficiently.
• Ability to independently manage the delivery of smaller projects (up to $50k) in a client-facing role, with strong technical discipline knowledge.
• Capability to manage project delivery commercials with support from senior team members and assist in proposal creation and delivery.
• Problem-solving and decision-making skills to coordinate tasks and resolve specific issues within areas of responsibility.
• Commitment to upholding AESG Core Values: Honesty, Flexibility, Adaptability, Client-centricity, and Collaboration.

Work Environment

This is a full-time position based in Riyadh, Saudi Arabia, within a dynamic and growing specialist consultancy firm.