Process Engineer Process Engineer Jobs in Ossining, NY

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AECOM is actively seeking a highly experienced and motivated Senior Mechanical Process Engineer to work as a mechanical process design engineer on large, complex, multi-discipline, high-profile water and wastewater treatment and pumping facilities for both traditional and design-build projects throughout the Greater New York Area. This position will be heavily focused on the detailed technical design associated with pump stations for water and wastewater, including pipe sizing calculations, selection of pump type, process facilities (primary, secondary, tertiary, and solids treatment systems), rotating equipment (centrifugal pumps, blowers), piping systems, valves, and appurtenances for in plant process piping, chemical systems, sludge and residual handling systems, and hydraulic studies.

The responsibilities of this position include, but are not limited to:

• Senior technical resource may serve as technical lead or advisor for team
• Supervise and support the work of others and mentor junior level engineer and design/drafting technical staff.
• Provides specialized technical input to studies and design for staff's specific area of expertise
• Develops study and design procedures to facilitate high quality cost effective work by others.
• Participates in interdisciplinary review of project deliverables
• Develops construction cost estimates and estimates of technical efforts for projects
• Uses expertise in all steps of completing discipline component of PS&E package
• Performs quality control review of design calculations or drawings
• Prepares technical specification sections
• Provides input to the development of engineering budget and schedule to meet requirements
• Serve as design manager and lead project tasks, in collaboration with project managers and clients, in the planning, design, permitting and construction of wastewater and/or reclaimed water facilities including but not limited to treatment facilities and conveyance systems as well as creating and/or overseeing the preparation of construction documents (drawings and specifications) and permit applications, as well as handling construction.

Minimum Requirements:

• BA/BS plus eight years of relevant experience or demonstrated equivalency of experience and/or education.

Preferred Requirements:

• Experience in the water/wastewater industry.
• Professional Engineering License (PE), New Jersey or New York preferred.
• Experience with AutoCAD and Building Information Modeling (BIM).
• Experience managing a team and development of junior staff.
• Must be a highly motivated self-starter with solid writing and verbal communication skills.
• Strong attention to detail and accuracy of work.
• Ability to meet quality, schedule and budget expectations.
• Ability to apply passion and enthusiasm for design in a collaborative and progressive team-oriented work environment.
• Proficient in Microsoft Office Suite (Word, Excel, Power Point).

• Relocation assistance is not available for this position.
• Sponsorship for US employment authorization is not available now or in the future for this position.
• THIS POSTING IS FOR A CURRENT VACANCY, AND AECOM INTENDS TO FILL THIS POSITION NO SOONER THAN FEBRUARY, 2027.

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.