Mechanical Process Engineer Job at AECOM, Chelmsford, MA

  • Chelmsford, MA

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 actively seeking a highly motivated Mechanical Process Engineer for employment in the Chelmsford, MA office. This Mechanical Process engineer position will involve a variety of new and renovations to existing water treatment facilities, water booster pump stations, and wastewater pumping and treatment facilities.

This position will be heavily focused on the detailed technical design associated with these facilities including:

  • Pumps, piping, valves, etc.
  • Headworks, screening, grit removal systems
  • Aeration, filtration, separation, dewatering and clarification systems
  • Odor control systems
  • Chemical feed systems
  • Disinfection
  • Sludge and residual handling systems
  • Work closely with project managers and design managers.
  • Develop process flow diagrams and assist with the development of process & instrumentation diagrams (P&IDs).
  • Perform hydraulic calculations for pump sizing including total dynamic head and operating points, net positive suction head margin, suction specific speed and submergence.
  • Research equipment and system design recommendations.
  • Coordinate with equipment vendors on equipment selections and draft specifications.
  • Develop technical specifications, equipment and piping plans, elevations, section and details.
  • Perform engineering related calculations for process equipment sizing and selection.
  • Verify compliance with applicable codes and engineering standards / practices.
  • Coordinate with other in-house engineering disciplines as needed.
  • Review shop drawings of proposed equipment from the construction contractor.
  • Performs specific and moderate portions of a broader assignment of an experienced engineer.
  • Gathers and correlates basic engineering data using established and well-defined procedures.
  • Works on detailed or routine engineering assignments involving calculations and relatively simple tests.
  • Proposes approach to solve new problems encountered using modifications of standard procedures or methods developed in previous assignments.
  • Identifies discrepancies in results.
  • Provides guidance to entry level engineers.
  • Performs work in accordance with agreed upon budget and schedule with little supervision.
  • Independently performs all the tasks necessary to complete primary design elements for engineering works.
  • Performance at this level requires developmental experience in a professional position.


Minimum Requirements:

  • Bachelor's degree in engineering and 6 years of experience in design and layout of mechanical process piping, valves, equipment, etc.



  • Licensed Professional Engineer.
  • 8+ years of experience in design and layout of mechanical process piping, valves, equipment, etc.
  • Proficient with AutoCAD and REVIT.
  • Experience in the water/wastewater industry.
  • Ability to work with a diverse team.
  • Excellent oral and written communication skills.
  • Detail-oriented and technical, yet experienced enough to see the big picture.
  • Experienced, self-directed professional.
  • Ability to work independently with minimal oversight.
  • Ability to meet quality, schedule and budget expectations.
  • Ability to multi-task and be flexible and able to adapt to rapidly changing project requirements and deadlines.
  • 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).

Additional Information

  • Relocation is not available for this position 
  • Sponsorship is not available for this position.



AECOM is proud to offer a comprehensive benefits program 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 absence, voluntary benefits, perks, U.S. and global well-being programs, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.

AECOM is the world’s trusted infrastructure consulting firm, delivering professional services throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. On projects spanning transportation, buildings, water, new energy and the environment, our public- and private-sector clients trust us to solve their most complex challenges. Our teams are driven by a common purpose to deliver a better world through our unrivaled technical and digital expertise, a culture of equity, diversity and inclusion, and a commitment to environmental, social and governance priorities. AECOM is a Fortune 500 firm and its Professional Services business had revenue of $14.4 billion in fiscal year 2023. See how we are delivering sustainable legacies for generations to come at and @AECOM.


Freedom to Grow in a World of Opportunity 

You will have the flexibility you need to do your best work with hybrid work options. Whether you’re working from an AECOM office, remote location or at a client site, you will be working in a dynamic environment where your integrity, entrepreneurial spirit and pioneering mindset are championed.

You will help us foster a culture of equity, diversity and inclusion – a safe and respectful workplace, where we invite everyone to bring their whole selves to work using their unique talents, backgrounds and expertise to create transformational outcomes for our clients.

AECOM provides a wide array of compensation and benefits programs to meet the diverse needs of our employees and their families. We also provide a robust global well-being program. We’re the world’s trusted global infrastructure firm, and we’re in this together – your growth and success are ours too.

Join us, and you’ll get all the benefits of being a part of a global, publicly traded firm – access to industry-leading technology and thinking and transformational work with big impact and work flexibility. As an Equal Opportunity Employer, we believe in each person’s potential, and we’ll help you reach yours.

All your information will be kept confidential according to EEO guidelines.

Job Tags

Full time, For contractors, Remote job, Worldwide, Relocation, Flexible hours,

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