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Process-Mechanical Engineer

Donohue and AssociatesSt. Louis, MO🇺🇸United StatesPosted 18 Aug 2026

Why This Role Stands Out

This hybrid Process-Mechanical Engineer role at Donohue & Associates offers you the chance to lead impactful water and wastewater projects with a nationally recognized firm, fostering significant career growth. You'll thrive here if you have a strong technical background, client-focused approach, and desire to collaborate within a supportive, employee-owned team environment. Apply to leverage your expertise and contribute to innovative infrastructure solutions while enjoying flexible work arrangements.

Quick Overview

Work Type
Hybrid
Level
Mid Senior

Job Description

Our Process-Mechanical Engineer position offers an exciting opportunity for the selected candidate to be part of Donohue & Associates, a firm with national water/wastewater expertise in a small company environment. We are seeking an experienced engineer who can work with clients to provide project leadership, planning, design, construction, and operational services for wastewater and/or water systems. You will collaborate closely with clients and Donohue project team members throughout each of these project phases.

Desired Qualifications:
  • Experience in planning and designing water and wastewater systems, including pumping, process and mechanical piping, and related valves and process equipment.
  • Positive team- and client-focused attitude directed towards delivering quality work on time and within budget.
  • Strong communication and interpersonal skills.
  • Active participation in related professional associations a plus.

Requirements:
  • B.S. in Environmental, Mechanical, Chemical, or related engineering degree
  • PE registration
  • 10+ years of relevant technical experience,

An employee-owned engineering consulting firm since 1997, Donohue & Associates has multiple offices across the upper Midwest. We work in multi-discipline teams to provide municipal and industrial clients with client-focused services for drinking water, wastewater, and stormwater infrastructure. Engineering News-Record ranks Donohue among the Top 20 Wastewater Treatment Plant Design Firms, and our innovative design teams consistently receive awards for engineering excellence.

Donohue offers a competitive wage and comprehensive benefits package, including:
  • Medical, dental, and vision insurance
  • Robust 401(k) plan with company contribution
  • Paid time off and company holidays
  • Flexible work schedules around core hours
  • Short- and long-term disability/life insurance
  • Flexible spending accounts (FSAs)
  • Professional organization support
  • Discretionary annual bonuses
  • Industry-unique monthly profit-sharing plan

At Donohue, you'll find a collaborative environment where your contributions directly influence our success-and yours.

Donohue is an Equal Opportunity Employer.

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