Floodplain and Dam Engineer
Chantilly, VA
Experience: 10
Category: Engineering
Contractor Work Model: Onsite
Brand: System One
Job ID: 375766
Date Posted: 07/21/2026
Shortcut: http://jobs.systemone.com/AYPI7A
Job Title: Floodplain and Dam Engineer
Location: Chantilly, VA
Overview
The Floodplain and Dam Engineer position involves work across floodplain modeling, permitting, floodplain crossing design, dam modeling, and dam permitting. The position supports hydrology and hydraulic (H&H) modeling for a variety of regional projects. Responsibilities include work within local and FEMA-regulated floodplains, as well as state-regulated dams in Virginia and Maryland.
Responsibilities
- Work across floodplain modeling, permitting, floodplain crossing design, dam modeling, and dam permitting.
- Support hydrology and hydraulic (H&H) modeling for regional projects.
- Perform work within local and FEMA-regulated floodplains, as well as state-regulated dams in Virginia and Maryland.
- Develop H&H models using topographic, GIS, and as-built data.
- Analyze, calibrate, and troubleshoot models.
- Prepare floodplain study, alteration, CLOMR, and LOMR packages.
- Conduct dam breach inundation studies, hazard assessments, and failure analyses.
- Perform floodplain and dam breach modeling and mapping.
- Prepare Emergency Action Plans and support emergency drill presentations.
- Design floodplain crossings (vehicular and pedestrian).
- Support dam rehabilitation and alteration design, coordinating with geotechnical engineers.
- Produce HEC-RAS models.
- Develop floodplain permitting packages.
- Conduct site visits for floodplain and dam inspections.
- Prepare local and state permit applications.
- Develop technical reports.
- Maintain knowledge of regulatory codes, standards, and policies.
- Manage multiple projects and deadlines.
- Coordinate with regulatory agencies to address comments and secure approvals.
- Communicate effectively with internal teams.
- Perform additional duties as required.
- Minimum of 2+ years of experience with HEC-HMS (or similar) and HEC-RAS modeling.
- Bachelor’s degree in Civil Engineering or a related field.
- Strong analytical and mathematical skills.
- Strong communication, writing, and organizational skills.
- Excellent attention to detail and quality control capabilities.
- Proficiency with ArcMap or similar GIS tools.
- 10+ years of experience in water resources engineering.
- Professional Engineer (PE) license (VA required; multi-state preferred).
- Proficiency with H&H modeling tools (HEC-RAS, HEC-HMS, etc.).
- Experience managing projects, teams, and client relationships.
- Strong organizational and analytical skills.
System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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