Industrial Mechanical Engineer

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. 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.