Water/Wastewater Engineer

ERG

📍Washington, DC
Posted May 22, 2026

Job Overview

Position

Water/Wastewater Engineer

Company

ERG

Location

Washington, DC

Work Type

On-site

Job ID

li-4417500357

Job Description

ERG is a research and consulting firm that provides a wide range of support to federal, state, and commercial clients. ERG offers multidisciplinary teams with nationally recognized skills in engineering, science, economics, public health, informational technology, and communications. We hire people with the best minds and then provide them with a vibrant and flexible environment in which to develop their careers. The qualified individual must be highly motivated with the skills to prioritize, perform, and communicate effectively in a fast-paced environment. 

ERG is seeking an experienced, highly motivated Water/Wastewater Engineer to lead and support a range of water infrastructure projects. In this role, you will work directly with communities across the country to assess infrastructure needs, develop solutions, and secure funding for critical projects. Your efforts will help communities address essential challenges in providing safe, clean drinking water and safeguarding water quality.

Job Description:

  • Independently assess community water and wastewater infrastructure needs and identify practical, cost-effective solutions


  • Develop clear, well-organized planning documents and technical reports, including Preliminary Engineering Reports (PERs)


  • Prepare preliminary and detailed project designs that municipalities can use to secure infrastructure funding


  • Lead meetings with community stakeholders to gather information, present recommendations, and foster project support and engagement


  • Depending on your experience and expertise, contribute to additional project areas, such as evaluating and promoting innovative water and wastewater treatment technologies, analyzing the design, cost, and environmental impacts of infrastructure projects, or supporting other related technical initiatives

Qualifications and Skills:

  • Bachelor’s degree in Civil or Environmental Engineering


  • Professional Engineer (PE) license in at least one U.S. state, or the ability and commitment to obtain a PE license within 12 months of hire


  • 5+ years of relevant experience in municipal water or wastewater system planning and design, with exposure to a variety of treatment systems; experience with funding, financing, and governance frameworks for Capital Improvement Programs is a plus


  • Willingness and ability to travel as needed to support community projects


  • Strong written and verbal communication skills, with the ability to clearly convey technical information to diverse stakeholders

ERG offers competitive salaries and excellent benefits, including health and dental insurance, life insurance, long-term disability, educational benefits, FSAs, a generous 401k plan, profit sharing, an EAP, 11-20 paid vacation days per year, 10 paid holidays per year, 56 hours or more of sick leave (based on the state you work in) per year (pro-rated for part-time) and more. The salary range for all positions depends on the years and type of experience. 

  

ERG is an equal opportunity employer and complies with all applicable EEOC regulations. All qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, sexual preference, national origin, disability, or status as a protected veteran.  

 

Please be aware, the only authentic corporate domain for ERG is https://www.erg.com.  ERG may, on occasion, screen applicants via telephone or video interviews via Skype, Teams, GoToMeeting, or another type of video platform. However, any candidate extended a job offer might be asked to meet in person with an ERG employee before providing confidential personal information associated with new employment. 

  

If you’re a qualified individual with a disability or a disabled veteran, you have the right to request a reasonable accommodation if you are unable or limited in your ability to use or access ERG’s online application process as a result of your disability. To request accommodation, please contact Human Resources via email at [email protected] or call (781) 674-7293. 

  

ERG fosters a friendly, flexible work environment. ERGers are dedicated to serving clients who are committed to making the world a better place. We promote and recognize principles of fairness and respect in the work we do, the partnerships we foster, and the culture we value both within and outside of our organization.

Interview Prep

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Key Skills

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Practice Questions

💡Technical Questions (3)
  • 1.Can you walk me through your process for developing a Preliminary Engineering Report (PER) for a municipal wastewater system upgrade?
  • 2.How do you approach evaluating and selecting innovative water or wastewater treatment technologies for a community project?
  • 3.When assessing a community's water infrastructure needs, how do you identify and design cost-effective solutions while ensuring regulatory compliance?
🎯Behavioral Questions (3)
  • 1.Tell me about a time you had to explain a complex water or wastewater engineering concept to a non-technical community stakeholder group.
  • 2.Describe a situation where you had to manage multiple high-priority water infrastructure projects simultaneously. How did you prioritize and ensure progress?
  • 3.Give me an example of a time you helped a community secure funding for a critical water or wastewater project.
🧩Situational Questions (2)
  • 1.You are leading a community meeting to present a recommended water infrastructure solution, but local residents are strongly opposed due to the high cost. How do you handle this?
  • 2.You arrive at a community for a site assessment and discover the infrastructure failure is much worse than documented, requiring a complete system overhaul rather than the planned upgrade. What are your next steps?

Resume Keywords

Make sure these keywords appear on your resume

Preliminary Engineering ReportWater InfrastructureWastewater TreatmentMunicipal PlanningPE LicenseStakeholder EngagementCapital Improvement ProgramCost-Effective SolutionsFunding ApplicationsNeeds AssessmentEnvironmental ComplianceTechnical Report Writing

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