Job 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 at AECOM. With 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.

Job Description

AECOM is the world’s trusted infrastructure consulting firm, partnering with clients to solve their most complex challenges and deliver a better world.

Job Description

AECOM is seeking a Senior Industrial Mechanical Engineer with experience with chem gas to lead the design of specialty gas, bulk gas and chemical distribution systems for our Advanced Manufacturing practice. You will be the technical authority on hazardous production materials and ultra-high-purity (UHP) systems, working directly with client facilities, EHS and tool teams from concept through turnover. Business sectors: semiconductor, battery, energy and nuclear fuel, and defense and aerospace.

Responsibilities include, but are not limited to:

• Design bulk and specialty gas systems (N₂, O₂, Ar, H₂, He, CDA; silane, NH₃, NF₃, HF, Cl₂, WF₆), including gas cabinets, VMBs/VMPs, purifiers and point-of-use connections.

• Design bulk chemical distribution for acids, bases, solvents, CMP slurry and battery electrolyte: dispense units, day tanks, reclaim and double-contained piping with leak detection.

• Specify UHP materials and quality: EP 316L stainless, PFA/PVDF, orbital welding, cleanliness, and particle, moisture and O₂ certification testing.

• Lead code and life-safety strategy: IBC/IFC Group H occupancy, MAQ and control-area analysis, HPM rooms, and HMIS/HMMP documentation.

• Coordinate toxic gas monitoring, emergency shutdown and exhaust abatement with HVAC, fire protection and controls.

• Develop P&IDs, utility matrices, tool hookup and point-of-connection (POC) design, and hydraulic and pressure-drop calculations.

• Support construction: submittals, RFIs, pressure and leak testing, commissioning and turnover.

• Serve as client-facing technical lead in workshops and pursuits; mentor plumbing and mechanical engineers to extend AECOM’s process-system capability.
• This role may require travel as needed to client sites.

Qualifications

Minimum Requirements

• Bachelor's degree in Mechanical or Chemical Engineering, or related field and 6 years of experience designing specialty gas or chemical distribution systems for semiconductor, battery, pharmaceutical or similar high-purity facilities or demonstrated equivalency of experience and/or education.
• Working knowledge of NFPA 55, NFPA 400, ASME B31.3, IFC hazardous materials provisions and CGA standards.
• PE license, or ability to obtain PE within 24 months.
• Proficiency in Revit and/or AutoCAD Plant 3D and P&ID development.
• Due to the nature of the role, United States citizenship is required.

Preferred

Qualifications

• 8+ years of experience, including 5+ years designing specialty gas or chemical distribution systems for semiconductor, battery, pharmaceutical or similar high-purity facilities.
• Semiconductor fab or tool-install experience; familiarity with SEMI S2, S6 and F-series standards and NFPA 318.
• Hydrogen systems, battery (electrolyte, NMP recovery) or NRC/DOE-regulated fuel-cycle facility experience.
• Background with an EPC, tool-install contractor or industrial gas supplier.
• Steam, heat-transfer fluid or process chemical system design.
• U.S. citizenship and ability to obtain a security clearance (required for Federal and defense projects).

Additional Information

Relocation assistance may be available.

Sponsorship for U.S. employment authorization is not available.

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM  

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options ,  well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work  

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community—where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines. 

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