Senior Water/Wastewater Engineer

About the role

Founded in 1973, ISG is a multi-disciplinary, full-service architecture, engineering, planning, and interior design firm, supporting clients throughout the nation. ISG is looking to add a Senior Water/Wastewater Engineer to our dynamic engineering team. As a Senior Water/Wastewater Engineer, you will make a real difference for Municipal and Industrial clients across the U.S., contributing to projects that improve lives and communities. We are a full-service, multi-disciplinary team, who perform award winning work in planning, design, survey, and construction.

You will work alongside industry leaders, Casey Patton , PE, Water/Wastewater Practice Group Leader, and Brian Hiles, Senior Water/Wastewater Engineer, along with several other innovative Wastewater professionals.

Lead with Impact - take charge of projects or contribute individually to help clients evaluate, plan, and implement water, wastewater, and reuse system operations
Conduct treatment technology assessments using data analysis, mass balance calculations, modeling, bench and pilot testing
Diagnose existing system operations, troubleshoot issues, and drive process improvements
Support long-range planning by assessing current systems and forecasting future capital and operational needs
Perform studies and alternative analyses to identify optimal treatment solutions that align with compliance and client goals
Design with Purpose - develop conceptual and detailed engineering plans and specifications for construction-ready solutions
Assist with construction, system start-up, troubleshooting, and operational support for new installations
Conduct field observations, inspections, and data collection to inform project decisions
Prepare permit submittals for water and wastewater projects, ensuring regulatory compliance
Work closely with team members, communities, and stakeholders to define project needs and deliver impactful results
Take on additional responsibilities as needed, contributing to a dynamic and evolving team environment
As an ISG employee owner , you will continue to grow in your career. You’ll learn from us, and we’ll learn from you. You’ll have the freedom and autonomy to do your best work with plenty of support along the way. Our culture is essential to our success and your engagement in it.

Here are some projects we've worked on recently that might give you a better sense of what you'll be doing day to day:
Clarion Water Treatment System
Hartford, SD Reclamation Facility Improvements
We’ve listed a compensation range that reflects our expectations for this role, including both direct and indirect components. We understand that your experience and value may fall outside of this range. If you feel you're a strong fit but your compensation needs differ, we’re open to a conversation—let’s talk.

Bachelor’s degree in Civil, Environmental, Mechanical, Chemical Engineering, or a related field
Registered Professional Engineer (PE), required
10+ years of hands-on experience in the design and drafting of water and wastewater infrastructure, including treatment facilities, groundwater wells, storage systems, distribution networks, pumping stations, collection systems, and lift stations
Strong command of water and wastewater engineering principles, with a knack for solving complex challenges
Experience in team building and leadership is a plus—we’re looking for someone who can inspire and guide others
Exceptional multitasking, organizational, and communication skills to keep projects moving and stakeholders informed