Water Process Engineer III – UPW & WW

ECOLAB; Washington (Washington County); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Medical

Dental

Vision

401k

Pension plans

Employee stock purchase plan

Job summary

ECOLAB is seeking a Process Engineer III to lead complex water treatment projects, including UPW, wastewater, and reclaim water systems. You will own design deliverables, perform mass balances, PFDs, and P&IDs, and interface with customers, A&E firms, and vendors to clarify requirements.

You will mentor juniors, apply CI, and contribute to on-time startup and startup performance. Role emphasizes technical leadership, ensuring safety and quality, and delivering systems that meet customer

Qualifications

• Bachelor’s degree in chemical or environmental engineering with 7+ years related experience.
• Experience owning designs for UPW or wastewater systems in a semiconductor fab.
• Ability to develop process calculations, sizing, and mass balances with limited supervision.

Responsibilities

• Own and execute process engineering scope for UPW, wastewater, and reclaim water systems.
• Develop and check core deliverables: mass balances, PFDs, P&IDs.
• Size equipment using vendor tools and software (PipeFlo, WAVE, PHREEQC).
• Review P&IDs, 3D models, and interdisciplinary docs for accuracy.
• Coordinate with automation, mechanical, electrical, and layout teams.
• Lead technical reviews with customers and provide written evaluations.
• Interface with vendors to evaluate equipment options and submittals.
• Support proposals, RFIs, and RFPs with sizing and risk evaluation.
• Participate in commissioning and startup for successful turnover.
• Mentor junior engineers and promote design standardization.

Skills

Process design

Mass balances

PFDs & P&IDs

Vendor sizing tools

3D modeling

UPW/Wastewater systems

Customer interface

Education

Bachelor’s degree in chemical or environmental engineering

Tools

AutoCAD Plant3D

PipeFlo

WAVE

PHREEQC

RO/EDI sizing tools

Job description

ECOLAB is seeking a Process Engineer III to lead complex water treatment projects, including UPW, wastewater, and reclaim water systems. You will own design deliverables, perform mass balances, PFDs, and P&IDs, and interface with customers, A&E firms, and vendors to clarify requirements.

You will mentor juniors, apply CI, and contribute to on-time startup and startup performance. Role emphasizes technical leadership, ensuring safety and quality, and delivering systems that meet customer