Senior Process Design Engineer – Industrial Wastewater

Ecolab

Senior Process Design Engineer responsible for designing and optimizing industrial wastewater treatment systems for Ecolab. Leading innovative solutions primarily for Food & Beverage sector while mentoring engineers.

Posted 7/3/2026full-timeNaperville • Illinois, Minnesota, Ohio, Texas, Wisconsin • 🇺🇸 United StatesSenior💰 $101,400 - $152,100 per yearWebsite

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Benefits

Comp & perks

medical
dental
vision
life insurance
accident insurance
critical illness insurance
hospital indemnity insurance
auto insurance
home insurance
pet insurance
identity theft protection
short-term and long-term disability
401k
pension plans
retirement health care benefits
short-term incentives
vacation (12 days)
holidays
parental leave
employee stock purchase plans (Full-Time Associates)
discount on day care services and caregiver services
adoption assistance
group legal services
employee assistance program
employee discount program
education assistance program
on-Site childcare and fitness facilities may be available at select Ecolab locations.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Process DesignMass BalancesHydraulic CalculationsUnit Operation DesignEquipment SizingSystem OptimizationTroubleshootingTreatment Technologies SelectionBiological Treatment ProcessesMembrane Processes

Soft Skills

Technical ResourceMentoringCollaboration