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Undergraduate and Graduate Internship Program

Expand your career horizons and create a sustainable future in a paid internship with the King County Wastewater Treatment Division.

2025 summer internship applications

Internship job postings typically advertise in January or February each year. Check back to this site for job postings or sign up to receive email notifications.

Learn about job notifications and application tips.

Check the careers website for other postings.

About the program

Four interns in hard hats and safety vests pose together smiling outside of the Georgetown Wet Weather Treatment Facility

Every year, King County Wastewater Treatment Division (WTD) hires a cohort of 10 to 20 full-time undergraduate and graduate summer interns. Summer interns receive paid compensation and serve anywhere from 3 to 6 months until classes resume.

At WTD, our interns work in a variety of disciplines, from treatment plant engineering to community outreach and education. At the end of the summer, interns present their projects and accomplishments to an audience of staff and hiring managers.

Why you’ll love working here

A group of 15 interns in hard hats and safety vests walk outside the Georgetown Wet Weather Treatment Facility

As an intern, you’ll join one of the largest wastewater utilities in the nation working to protect public health and the environment. You’ll create real value for WTD projects, programs, and the agency while gaining job experience, networking opportunities, and learning about our clean water systems.

At WTD, our interns are exposed to careers and opportunities they might not have imagined before. Participants have used their internships to acquire jobs at WTD and throughout King County, their university, and elsewhere in both the public and private sectors.

Meet our past interns

Meet some of our former interns and learn the role they served at WTD.

Head shot of Monica Dawson
Monica Dawson

Designer Graduate Intern

Course of Study: Master’s in Construction Management at the University of Washington

WTD Team: Design and Drafting

Role: Assist WTD in creating 3D BIM models of all existing treatment plants and pump stations and gain extensive experience working in AutoCAD.

Head shot of Ethan Diep
Ethan Diep

Electrical Engineering Instrumentation and Controls Undergraduate Intern

Course of Study: Bachelor’s in Electrical and Computer Engineering at the University of Washington

WTD Team: Engineering Instrumentation and Controls

Role: Update and review piping and instrumentation diagrams and instrumentation loop diagrams for the off-site level controls and communication upgrade program.

Head shot of Claire Ellerbrook
Claire Ellerbrook

Environmental Planning Undergraduate Intern

Course of Study: Bachelor's in Biology with minors in Environmental Studies and Spanish at Middlebury College

WTD Team: Environmental Services

Role: Create a habitat enhancement tool to rate sites for potential habitat work, such as native plant installation, stream restoration, and bird or bat boxes. Shadow team members to learn about permitting, mitigation sites, and geographic information systems.

Head shot of Pravir Goosari
Pravir Goosari

Data Science Undergraduate Intern

Course of Study: Bachelor’s in Electrical and Computer Engineering at the University of Washington

WTD Team: Modeling

Role: Redesign the Live and Historical Data Portal, making it accessible to everyone in WTD for easy data gathering and analysis.

Head shot of Rylee Hafitz
Rylee Hafitz

Finance Graduate Intern

Course of Study: Master of Public Administration at the University of Washington

WTD Team: Finance Administration

Role: Explore how WTD’s state and federal loan programs compare to nationwide peers, focusing on capital spending and bond issuance. Support the transfer of historical sewer rate data into a single database.

Head shot of Opal Heltzel
Opal Heltzel

Plant Engineering Undergraduate Intern

Course of Study: Bachelor’s in Chemical Engineering at Purdue University

WTD Team: West Point Treatment Plant Operations and Maintenance

Role: Tackle multiple treatment plant engineering improvement projects and update piping and instrumentation diagram drawings.

Head shot of Christopher Kleeves
Christopher Kleeves

Plant Engineering Undergraduate Intern

Course of Study: Bachelor’s in Environmental Engineering at the University of Washington

WTD Team: West Point Treatment Plant Operations and Maintenance

Role: Correct drawings, create process and instrumentation diagrams (P&ID), and support maintenance projects to ensure the plant runs optimally and safely into the future.

Head shot of Jesus Lopez
Jesus Lopez

Communications Undergraduate Intern

Course of Study: Bachelor’s in Communication at the University of Washington

WTD Team: Director’s Office

Role: Focus on growing WTD social media channels, especially the newly launched Instagram account, and providing opportunities to develop storytelling skills.

Head shot of Rosa Mason
Rosa Mason

Engineering Graduate Intern

Course of Study: Master’s in Civil Engineering, Hydrology and Hydrodynamics, at the University of Washington

WTD Team: Mechanical Engineering

Role: Evaluate and improve pump station efficiency, conduct chlorine testing at off-site facilities, and create a plan to replace critical gates at West Point Treatment Plant.

Head shot of Amritha Prakash
Amritha Prakash

Data Science Graduate Intern

Course of Study: Master’s in Applied Data Science at Indiana University

WTD Team: Modeling

Role: Redesign the real time and historical data portal to display data from multiple facilities.

Head shot of Ananya Ranganatha
Ananya Ranganatha

Construction Management Graduate Intern

Course of Study: Master’s in Construction Engineering and Management at Illinois Institute of Technology

WTD Team: Construction Management

Role: Prepare work order letters for construction projects and research contracts and submittals to understand the different stages of construction.

Head shot of Sachin Rao
Sachin Rao

Climate Adaptation Planning Undergraduate Intern

Course of Study: Bachelor’s in Political Science and Environmental Studies at Case Western Reserve University

WTD Team: Climate Adaptation Planning

Role: Compile information on climate adaptation methods for wastewater treatment facilities and their associated greenhouse gas emissions.

Head shot of Braedyn Reed
Braedyn Reed

Communications Undergraduate Intern

Course of Study: Bachelor’s in Community, Environment, and Planning with a Minor in Leadership at the University of Washington

WTD Team: Workforce Development

Role: Improve onboarding processes, develop communication and relationship-building materials, and create branding materials.

Head shot of Celeste Wrye
Celeste Wrye

WaterWorks Grant Program Graduate Intern

Course of Study: Master of Public Administration at the University of Washington

WTD Team: Education and Engagement

Role: Manage grant expense forms, reconciliations, and amendments, and develop a program evaluation survey.

Head shot of Susie Zhang
Zhixian (Susie) Zhang

Capital Training Program Instruction Design Graduate Intern

Course of Study: Master’s in Communication Digital Media at the University of Washington

WTD Team: Capital Training

Role: Conduct UX research and design a Capital Program Training hub and communication engagement strategy.

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