Mechanical Engineer

Company Description

Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be h accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

We are seeking a talented and detail-oriented Mechanical Engineer to join our dynamic team in Riyadh, Saudi Arabia. In this role, you will be instrumental in designing, analyzing, and optimizing mechanical systems that drive our organization's success. You will collaborate with cross‑functional teams to develop innovative solutions, ensure compliance with industry standards, and deliver high‑quality engineering outcomes. This is an excellent opportunity for a professional who is passionate about mechanical engineering and committed to continuous improvement and excellence.

• Design and develop mechanical systems, including HVAC, hydronic, and air‑side systems, with a focus on efficiency, reliability, and performance optimization
• Perform detailed load calculations, capacity planning, and heat load analysis to determine system requirements and ensure proper equipment sizing
• Select and specify appropriate mechanical equipment and components based on project requirements, industry standards, and cost‑effectiveness
• Develop comprehensive technical drawings, specifications, and documentation using CAD software (AutoCAD, Revit) and other engineering tools
• Conduct computational fluid dynamics (CFD) analysis and simulations to optimize airflow distribution, identify potential issues, and recommend design improvements
• Create and maintain detailed P&IDs (Piping and Instrumentation Diagrams), flow diagrams, and sequences of operations for mechanical systems
• Collaborate with electrical engineers, architects, contractors, and other stakeholders to ensure seamless integration of mechanical systems with overall project infrastructure
• Review and approve contractor shop drawings, material technical submittals, and requests for information (RFIs) to ensure compliance with design specifications
• Develop and review Method of Procedures (MOP) and Commissioning (Cx) procedures and documentation
• Analyze and interpret local building codes, regulations, and industry standards to ensure all designs meet compliance requirements
• Implement energy‑efficient design strategies and sustainability initiatives to minimize operational costs and environmental impact
• Troubleshoot mechanical system issues and provide innovative solutions to complex engineering challenges
• Participate in project meetings and effectively communicate design plans, progress updates, and technical recommendations to all stakeholders
• Mentor and support junior engineers, fostering a collaborative and learning‑oriented team environment
• Stay current with industry advancements, emerging technologies, and best practices in mechanical engineering

• 3‑5+ years of professional experience in mechanical engineering, systems design, or a related field
• Proficiency in HVAC, hydronic, and air‑side system design, including load calculations, equipment selection, ductwork and piping design, and control systems
• Strong proficiency with engineering software and tools, including AutoCAD, Revit, and computational fluid dynamics (CFD) analysis software (Ansys, IES, Cradle, or similar)
• Demonstrated experience in developing technical drawings, specifications, and comprehensive engineering documentation
• Solid…