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Process Engineering Intern - Wastewater

Overview

Carollo Engineers is an internationally recognized environmental engineering firm that specializes in the planning, design, and construction of water and wastewater facilities. We are seeking a Process Engineering-Intern-Wastewater for our Seattle office. 

As part of our team, you will work on projects related to municipal water treatment plants, including but not limited to major treatment plant expansions, regional water quality studies, and critical drinking water projects.  Our ideal candidate is highly motivated, articulate, and a self-starter.

 

At Carollo you’ll make an impact at an organization that does meaningful work, fosters a collaborative team culture, and creates a diverse, inclusive environment where you feel like you belong. You’ll work alongside a collaborative and dynamic team of professionals that is truly passionate about our work. Carollo’s vision is to be the BEST water consulting firm and you’ll find that Carollo is also the best place for you to build your career.

Responsibilities

  • Performs engineering work in wastewater treatment and conveyance infrastructure.
  • Prepares reports and makes presentations.
  • Develops plans and specifications.
  • Prepares cost estimates for various wastewater projects.
  • Conducts hydraulic system modeling.
  • Prepares permitting and alternative analysis documents.
  • Provides engineering services during construction.

Qualifications

  • Highly motivated, articulate and self-starter.
  • Enrolled or completed sophomore or junior year of civil or environmental engineering degree program.
  • Coursework that directly applies include: hydraulics, physical, chemical, and biological treatment processes and treatment plant design.

Preferred Qualifications

  • Apply engineering principles including critical thinking and analysis.
  • Strong verbal and written communication skills.
  • Works well in a team environment.
  • Ability to communicate effectively with team members.
  • Excited about in-person mentoring and collaboration.

Pay Range

$25.00 to $30.00 per hour. This is the lowest to highest hourly rate we in good faith believe we would pay for this role at the time of this posting. 

Average salary estimate

$57200 / YEARLY (est.)
min
max
$52000K
$62400K

If an employer mentions a salary or salary range on their job, we display it as an "Employer Estimate". If a job has no salary data, Rise displays an estimate if available.

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SENIORITY LEVEL REQUIREMENT
TEAM SIZE
No info
HQ LOCATION
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EMPLOYMENT TYPE
Internship, onsite
DATE POSTED
October 18, 2025
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