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Process Mechanical Engineer

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: Jacobs
Full Time position
Listed on 2026-01-01
Job specializations:
  • Engineering
    Environmental Engineer, Process Engineer
Job Description & How to Apply Below
Location: St. Louis

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This range is provided by Jacobs. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

$/yr - $/yr

At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good.

Your impact

We share a common purpose – to make the world more connected and sustainable. And we’re excited about the innovative ways we can change the world. If you are also interested in turning abstract ideas into realities that transform the world for good, then Jacobs is where you belong. We are looking for a passionate and dedicated Process Mechanical Lead Engineer in Missouri.

As part of our team, you’ll have the chance to work on projects that bring innovative solutions to our municipal clients’ water and wastewater challenges locally and worldwide.

As our Missouri Process Mechanical Lead Engineer, you’ll be charged with planning, preliminary, and detailed design of water and wastewater pumping stations and treatment plants across Missouri and the region. This will include specifications and plan development associated with pumping stations and treatment plant upgrades and expansions. You will be preparing general arrangement drawing for treatment equipment and tanks, designing piping and pumping systems as well as provide oversight of construction.

You’ll also evaluate and select equipment, piping materials and valves, assist with facility layouts, develop calculations, process flow diagrams, P&IDs and construction documents. In addition, you’ll coordinate with other project disciplines, direct the work of CAD designers, and produce construction documents.

Using your leadership skills, you’ll be part of a team engaged in delivering some of the most exciting projects in the region and beyond. You’ll serve on projects as the Process Mechanical Discipline Lead which is one of the most important roles on a design project. You’ll oversee process mechanical teams and provide overall leadership to projects. This role will also serve as the point of contact for our process mechanical practice which will include collaborating within the community of practice, setting standards and best practices within our region, most importantly, mentoring and growing our team.

At Jacobs, you’ll also have the chance to work across all of our core water technical areas which are Drinking Water & Reuse, Municipal Wastewater, Distribution and Conveyance, Water Resources, and Industrial Water.

We value collaboration and believe that in-person interactions are crucial for both our culture and client delivery. We empower employees with our hybrid working policy, allowing them to split their work week between Jacobs offices/projects and remote locations enabling them to deliver their best work.

Here's what you'll need

  • Bachelor’s Degree in Civil, Environmental, Mechanical Engineering, or similar degree from an accredited university or college
  • Minimum of 7 years of experience in various aspects of process mechanical design of water and wastewater systems
  • Holds an active professional engineering (PE) license with ability to obtain Missouri license within 6 months
  • Experience and familiarity with National Building Codes, EPA regulations, and 10 States Standards.
  • Capable of working in a team environment, including giving and receiving critical feedback
  • Strong and effective verbal and written communications skills
  • Successful experience with working and managing remote domestic and international staff
  • Proficiency with Microsoft Office Suite
Ideally, You’ll Also Have

  • 10+ years’ experience in industrial, water, or wastewater process mechanical engineering.
  • Proficiency in hydraulic modeling software such as Pipe-Flo
  • Developing process flow diagrams to define mass balance
  • Participating in planning,…
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