Senior Hydraulic Modeler

At HDR, our employee-owners are fully engaged in creating a welcoming environment where each of us is valued and respected, a place where everyone is empowered to bring their authentic selves and novel ideas to work every day. The culture of inclusion permeates the company and our communities, encouraging us to consider the impact we have on the world.

HDR needs a Senior Hydraulic Modeler/Planner to join our Water Business Group team in the New York/New Jersey offices. The ideal candidate will have a background leading teams in utility management, master planning, facility planning, and hydraulic modeling projects related to water supply, stormwater, sanitary and combined sewer collection, and water reuse systems.

Responsibility includes:

• Preparation of planning studies, development and calibration of water, stormwater, and wastewater hydraulic models.
• Performance of GIS data analysis, alternatives analysis, execution of infrastructure renewal and rehabilitation studies, preliminary engineering, cost analysis, and capital project development.
• Client interaction: development of proposals, scopes, level of effort estimates, project presentations, and report writing.
• Supervision of teams, mentoring, and quality assurance/quality control activities for hydraulic modeling and master planning projects.

Specific expectations for a Senior Hydraulic Modeler:

• Project and task management; conduct complex hydraulic and hydrologic modeling; conduct stormwater collection systems modeling and design; collect, assimilate and present data in reports, memos and public forums; lead production of design calculations and technical reports; prepare engineering plans and specifications for detention facilities, storm drains, flood control facilities and other hydraulic structures.
• Work independently and supervise medium to large teams of professionals and technicians.
• Serve as project manager on larger projects as needed.
• Prepare proposal, scopes of work and contract cost estimates.
• Perform other duties as required.

• MS in Civil or Environmental Engineering or related field.
• Proficiency in ArcGIS Pro, mapping and analysis.
• Knowledge and experience with Info Works ICM, Water
  
  GEMS, EPA/XP/PCSWMM, HECHMS, HECRAS, Info Water, Hydro
  
  CAD.
• Experience mentoring junior modeling and planning staff.
• Experience working for a public, municipal, or investor‑owned water and/or wastewater utility, public works department, or engineering consulting firm.
• Experience assisting with project budgeting, project management and client management activities.
• Experience working with clients within New York / New Jersey.
• Local candidates preferred.

• Bachelor's degree in Civil Engineering or equivalent field.
• Minimum of 10 years Water Resources experience.
• Professional engineering license recognized by the licensing board for the location of the position offered (e.g., PE or P.Eng).
• Experience in water resources planning, hydrology/hydraulics and drainage/flood control design.
• Familiarity with DOT drainage design criteria.
• Experience in FEMA studies a plus.
• Excellent writing and communication skills.
• Ability to work independently and as part of a project team.
• Commitment to an employee‑owned culture is a must.

HDR is our company. Our collaborative culture encourages trust and connects us closer to clients and communities.

As employee owners, we create an inclusive environment where each of us is welcomed, valued, respected and empowered to bring our authentic selves to work every day. Our Employee Network Groups foster belonging and support.

United States – New Jersey – Woodcliff Lake

United States – New Jersey – Newark;
United States – New York – New York;
United States – New Jersey – Pennington

Water

Full‑time

Regular

Business Class:
Utility Management Services

May 8, 2026

At HDR, we are committed to the principles of employment equity.

We are an affirmative action and equal opportunity employer. We consider all qualified applicants, regardless of criminal histories, arrest and conviction records.