Water/Wastewater Engineer Internships

Water/wastewater engineer internships give university students, recent graduates, and early-career switchers hands-on project experience treating real infrastructure challenges, mentorship from working engineers, and, at many employers, a path toward a full-time offer. Demand is strongest across {{top_industries_phrase}}, with DOWL, Bowman, and Consor among the employers posting roles now.

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Overview

Open roles20
Top stateFlorida
Top employerDOWL
Top cityNaples, FL
Work type75% On-site
Top credentialHigh school diploma or GED

Showing 5 of 20+ Water/Wastewater Engineer Internships

Intern, Water / Wastewater
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New 9h ago
Intern, Water / Wastewater
Egis Group
Dallas, Texas
Business Analysis
Consulting & Professional Services
Project Management
10,000+

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CAD Intern- Water/ Wastewater
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Added 1w ago
CAD Intern- Water/ Wastewater
Kimley-Horn
Saint Petersburg, Florida
Administrative & Office Support
Corporate Training
Learning & Development
On-Site
High school diploma or GED
5,001-10,000

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Intern - Drinking Water & Wastewater - MI/OH/GA
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Added 1w ago
Intern - Drinking Water & Wastewater - MI/OH/GA
Spicer Group
Saginaw, Michigan
Civil Engineering
Construction Management
Engineering (Non-Software)
High school diploma or GED
201-500

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Water/ Wastewater Engineering Intern - Summer 2027
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Water/ Wastewater Engineering Intern - Summer 2027
Jacobs
Orlando, Florida
Accounting
Business Operations
Tax
$40k - $60k/yr
Hybrid
10,000+

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Water & Wastewater Treatment Engineering Intern
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Added 1w ago
Water & Wastewater Treatment Engineering Intern
Consor
Knoxville, Tennessee
Engineering (Non-Software)
Manufacturing Engineering
Mechanical Engineering
On-Site
Bachelor's degree in engineering
1,001-5,000

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Water/Wastewater Engineer Internship Market

Who's Hiring

DOWL6 open roles
Bowman3 open roles
Consor2 open roles

Tips for Your Water/Wastewater Engineer Internship Search

Apply earlier than your classmates do

Large consulting firms, federal agencies, and municipal utilities fill summer water/wastewater engineer intern cohorts the preceding fall, often closing applications by November. Smaller companies and co-op programs post closer to start dates. Starting your search in September gives you access to the structured programs and the rolling openings.

Build a portfolio before you send a single application

Hiring teams for water/wastewater engineer interns expect limited work history, so your projects carry the weight. Document two or three complete designs or analyses, name every tool you used, such as AutoCAD, EPANET, or ArcGIS, and make the work viewable, whether that is a PDF portfolio, a shared drive folder, or a formatted project report you can send on request.

Work your campus network alongside direct applications

Career fairs surface structured programs tied to your university, and professors with industry contacts often know which firms recruit from your school before roles appear publicly. Apply directly to companies running smaller cohorts at the same time, since many water/wastewater engineering teams hire without visiting campuses. Both channels together reach more of the hiring market than either one alone.

Practice your technical screen out loud before you apply

Water/wastewater engineer intern interviews typically include a technical component, such as a hydraulics problem, a water quality scenario, or a design question drawn from coursework. Practice your answers aloud and explain your reasoning step by step, since interviewers weigh how you think through an engineering problem as much as whether you land on the right answer.

Target structured rotational and university programs early

Larger environmental engineering firms and utilities run formal intern cohort programs built to train people new to the field, rotating participants across treatment operations, design, and regulatory compliance. These programs recruit in the fall and fill fast. Identify the ones aligned with your coursework, apply in the first wave, and follow their timelines closely.

Set your work-type filter before you start

On-site roles are 75% of the water/wastewater engineer internships listed here. Decide what you can realistically commit to before you search, then filter by location and work type so you are only reviewing roles you can actually accept. Sorting that out first saves time and keeps your applications focused.

Water/Wastewater Engineer Internships: Frequently Asked Questions

How do I get a water/wastewater engineer internship?

Lead with coursework and projects rather than work history, since hiring teams expect limited experience at the intern level. A design portfolio or documented project report, showing treatment system modeling, hydraulic calculations, or CAD drawings, gives recruiters something concrete to assess. Pair direct applications with campus career fairs, where environmental and civil engineering recruiters often move faster for students they meet in person.

Can a water/wastewater engineer internship turn into a full-time job?

Many employers extend return offers to strong interns, but conversion is never guaranteed. For water/wastewater engineer interns, what drives it most is the quality of your technical deliverables, your reliability on project timelines, and whether the team has headcount when you graduate. Treat the internship as an extended audition, contribute meaningfully to real work, and ask your manager early about the return-offer timeline.

When should I apply for water/wastewater engineer internships?

Earlier than most students expect. Large municipal utilities, consulting engineering firms, and federal agencies recruit summer interns the preceding fall, often wrapping cohorts by November or December. Smaller companies and co-op programs post much closer to start dates, so openings appear year-round. Checking listings regularly means you catch both waves instead of missing the early one.

Are water/wastewater engineer internships paid?

Most professional water/wastewater engineer internships in the U.S. are paid. Compensation varies by company size, industry, and location, with larger consulting firms and utilities typically offering more structured packages than smaller municipalities or nonprofits. Where an employer discloses pay, it appears directly in the listing, so you can compare offers without having to ask upfront.

What should a water/wastewater engineer internship resume include?

Lead with two or three complete, documented projects rather than work history. For water/wastewater engineer candidates, the strongest proof is a design portfolio, CAD drawings, hydraulic or water quality modeling outputs, or a written project report that names the tools you used, such as AutoCAD, EPANET, or ArcGIS. Add relevant coursework in environmental engineering, fluid mechanics, or water chemistry, and keep the whole document to one page.

Are there remote water/wastewater engineer internships?

Yes. Remote and hybrid roles make up 25% of the water/wastewater engineer internship listings here, with the rest on-site. Remote cohorts fill quickly because they draw applicants from across the country, so apply early and filter by work type to see those openings before they close.

Can international students get water/wastewater engineer internships?

Yes. F-1 students can intern through CPT while enrolled or through OPT work authorization after finishing a degree, and the employer does not have to file anything for either, so many companies are open to international interns. Confirm your eligibility and timing with your university's international student office before accepting an offer.

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