Project Engineer - Water & Wastewater Conveyance
Listed on 2026-09-10
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Engineering
Water Engineer, Civil Engineering, Environmental Engineer
Project Engineer – Water & Wastewater Conveyance
Location:
Hybrid – DC-MD-VA region
About Inter Agency Inc.
Inter Agency Inc. is a dynamic and fast-growing water resource consultancy specializing in infrastructure planning and environmental compliance across the D.C., Maryland, and Virginia region. Over our 15-year history we have provided facility design, regulatory coordination, NEPA and Clean Water Act permitting, and program management support on multibillion-dollar deep tunnel programs, biosolids facility upgrades, coastal resilience projects, and drinking water access initiatives.
Position Overview:
Inter Agency Inc. is seeking a Project Engineer to perform design and analysis tasks on our water and wastewater conveyance work. We are looking for highly motivated, process-driven, and detail-oriented professionals to support our senior engineers in design, analysis, and project management tasks. Our current projects center on water and wastewater conveyance in the Mid-Atlantic region, with our current client base including DC Water, WSSC, Fairfax, Loudoun, Arlington and Alex Renew.
Key Responsibilities:
- Perform design and analysis tasks for water and wastewater conveyance assignments, including hydraulic capacity evaluation, alternatives analysis, rehabilitation versus replacement strategy, pipeline and force main design, pump and lift station design, diversion and flow control structures, and trenchless and tunnel engineering support. Tasks may include, but are not limited to:
- Building and running hydraulic models and preparing engineering calculations, including capacity evaluations, alternatives analyses, and hydraulic profiles, and document assumptions and results clearly enough for independent review.
- Producing plans, details, specifications, and technical memoranda in AutoCAD/Civil 3D, GIS, and Microsoft Office, and incorporating review comments from senior staff, clients, and reviewing agencies.
- Supporting condition assessment, inflow and infiltration, and capacity assurance work, including data compilation, field data reduction, and GIS analysis.
- Supporting construction-phase services, including submittal and RFI review, field observation, and record drawing preparation.
- Conduct field work including site reconnaissance, manhole and structure inspection support, flow monitoring coordination, and construction observation.
- Coordinate directly with engineering partners, client staff, and Inter Agency colleagues on assigned tasks.
- Contribute technical content to SOQs, proposals, scopes of work, and fee estimates.
- Check and review the work of junior engineers and technical staff as the practice grows.
Qualifications:
Required Qualifications:
- Bachelor's degree in Civil Engineering, Environmental Engineering, or a closely related discipline.
- 5+ years of progressive engineering experience with a primary focus on water and wastewater conveyance (gravity sewers and interceptors, force mains, water transmission and distribution mains, pumping and lift stations, diversion and flow control structures, and/or tunnels and trenchless construction).
- Current Professional Engineer (PE) license, or EIT certification with PE examinations scheduled or completed. Licensure in Washington, DC, Maryland, or Virginia preferred; candidates eligible for licensure by reciprocity will be considered.
- Demonstrated experience supporting water or wastewater capital programs in a technical capacity.
- Demonstrated ability to carry design and analysis tasks to completion with limited day-to-day direction.
- Working knowledge of hydraulic principles as applied to pressurized and gravity systems, and experience with hydraulic modeling or design software.
- Proficiency with AutoCAD/Civil 3D and GIS.
- Clear technical writing, with experience…
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