Senior Process Design Engineer - Industrial Wastewater

Senior Process Design Engineer - Industrial Wastewater ECOLAB United States, Illinois, Naperville Company Location (Show on map) May 29, 2026 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. What's in it For You Opportunity to own complex process designs from concept through startup and optimization Exposure to a wide range of industrial wastewater treatment and reuse applications, with a strong focus on Food & Beverage Ability to work directly with customers, internal teams, and technology partners Platform to provide technical leadership, mentoring, and knowledge sharing across the organization Involvement in developing standard designs, best practices, and continuous improvement initiatives What You Will Do 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

Position Details Location:

Naperville, IL or Remote (U.S.-based, near a major airport)

Travel:

Approximately 20%+ (domestic)

Employment Type:

Full-time Minimum Qualifications 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 Preferred Qualifications 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 Annual or Hourly Compensation Range The pay range for this position is $101,400.00 - $152,100.00. Many factors are taken into consideration when determining compensation, such as experience, education, training, geography, etc. We comply with all minimum wage and overtime laws. Benefits Ecolab strives to provide comprehensive and market-competitive benefits to meet the needs of our associates and their families.

Click here to see our benefits. If you are viewing this posting on a site other than our Ecolab Career website, view our benefits at jobs.ecolab.com/working-here. Potential Customer Requirements Notice To meet customer requirements and comply with local or state regulations, applicants for certain customer-facing roles may need to: - Undergo additional background screens and/or drug/alcohol testing for customer credentialing. - Be fully vaccinated for COVID-19, including a booster if eligible, unless a religious or medical accommodation is requested by the applicant and approved by Ecolab. Americans with Disabilities Act (ADA) Ecolab will provide reasonable accommodation (such as a qualified sign language interpreter or other personal assistance) with our application process upon request as required to comply with applicable laws. If you have a disability and require accommodation assistance in this application process, please visit the Recruiting Support link in the footer of each page of our career website. Our Commitment to a Culture of Inclusion & Belonging At Ecolab, we believe the best teams are inclusive. We are on a journey to create a workplace where every associate can grow and achieve their best. We are committed to fair and equal treatment of associates and applicants and recruit, hire, promote, transfer and provide opportunities for advancement based on individual qualifications and job performance. In all matters affecting employment, compensation, benefits, working conditions, and opportunities for advancement, we will not discriminate against any associate or applicant for employment because of race, religion, color, creed, national origin, citizenship status, sex, sexual orientation, gender identity and expressions, genetic information, marital status, age, disability, or status as a covered veteran. In addition, we are committed to furthering the principles of Equal Employment Opportunity (EEO) through Affirmative Action (AA). We will consider for employment all qualified applicants, including those with criminal histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance, the San Francisco Fair Chance Ordinance, and the York City Fair Chance Act.