Senior Process Design Engineer – Industrial Wastewater

Ecolab Inc.•Naperville, IL

1d•$101,400 - $152,100•Hybrid

About The Position

We are seeking an experienced process engineering professional to lead the design and deployment of industrial wastewater treatment, reuse, and recycle solutions. In this role, you will serve as a technical leader supporting Food & Beverage customers, while also contributing to projects across other industrial sectors. You will be responsible for process design from early concept development through detailed engineering, commissioning, and optimization, partnering closely with sales, project execution, and customers to deliver reliable, high-performing treatment systems.

Requirements

Bachelor’s or Master’s degree in Chemical Engineering
10+ years of water and wastewater treatment process design experience
Strong background in industrial wastewater treatment and system integration
Experience developing process designs for complex treatment systems, including biological, chemical, and/or membrane processes

Nice To Haves

15+ years of process design experience
5–10+ years of experience in industrial wastewater reuse and recycle systems
Experience with Food & Beverage wastewater treatment applications
Experience across other industrial sectors such as Chemical, Data Centers, or Primary Metals

Responsibilities

Develop conceptual and preliminary process designs for industrial wastewater treatment, reuse, and recycle systems, primarily for Food & Beverage applications
Define treatment strategies and system configurations based on wastewater characteristics, recovery goals, and discharge or reuse requirements
Prepare mass balances, process flow diagrams (PFDs), and high-level system layouts
Develop complete process design packages, including PFDs, P&IDs, hydraulic calculations, and mass and energy balances
Design full wastewater treatment trains, including pretreatment, core treatment, and post-treatment processes
Select appropriate treatment technologies and perform unit operation design and equipment sizing
Generate equipment lists, process design criteria, and support solution costing
Support project execution through design reviews, commissioning, startup, and system optimization
Troubleshoot process performance issues and validate system performance in the field
Serve as a technical resource to sales, service, and implementation teams and support training and mentoring of engineers