Industrial Water/Wastewater Process Engineer

About the role

ISG, a multi-disciplinary firm founded in 1973 offering architecture, engineering, environmental and planning services, is adding to its Water/Wastewater team in Sioux Falls. It seeks an Industrial Water/Wastewater Process Engineer for its industrial practice, which serves clients such as food and beverage, dairy, agriprocessing and manufacturing. The engineer develops process designs for water and wastewater treatment, reuse and related systems, works with senior engineers, mentors interns and early-career staff, and contributes to technical learning and industry presence.

Key responsibilities

• Develop process designs and detailed calculations (mass balances, hydraulic profiles, equipment sizing, process modeling) for physical/chemical, biological, pretreatment and reuse systems
• Analyze influent/effluent variability and site conditions to tailor solutions to each client's process
• Manage multiple fast-moving industrial projects with clear priorities and organized workflows
• Produce PFDs/P&IDs, specifications, reports and QA/QC checklists, coordinating with multi-disciplinary teams and vendors
• Support site visits, pilot testing, startups/commissioning and operator training
• Structure and interpret data to inform design decisions and validate results
• Share knowledge internally, present or co-author technical papers, and represent ISG at industry and technical conferences
• Mentor interns and early-career staff

Required profile

• B.S. in Chemical Engineering or Environmental Engineering (preferred); strong process-focused candidates from related fields may be considered
• 2-4 years of relevant experience in industrial or water/wastewater process design; more experienced applicants are welcome
• Ability to think critically, ask the right questions and validate that results are physically and logically reasonable
• Clear verbal and written communication, able to work independently and proactively seek guidance
• PE or EIT certification or progress toward PE licensure
• Experience with industrial sectors such as food and beverage/dairy, agriprocessing and manufacturing

Required skills

• Familiarity with process modeling tools and developing PFDs/P&IDs
• Proficiency with Excel and engineering calculation tools
• Interest in and experience presenting at or attending conferences such as WEFTEC and Water Reuse, and membership in professional organizations such as WEF, AWWA or Water Environment Federation chapters

What we offer

• Salary of $70,000 - $125,000 per year
• Medical, dental and vision coverage
• Paid time off, paid holidays, paid volunteer time and bereavement leave
• Paid parental leave and bi-annual profit sharing
• Employee ownership stock plan (ESOP) and 401K retirement plan
• Life insurance, HSA and FSA options, and supplemental voluntary benefits
• Short and long-term disability, parking reimbursement, cell phone plan and mileage reimbursement