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Efdc information

What is an EFDC modeler?

EFDC modelers are professionals who use the Environmental Fluid Dynamics Code (EFDC), a numerical modeling system developed to simulate water bodies such as rivers, lakes, estuaries, and coastal regions. They use EFDC to analyze and predict water quality, hydrodynamics, sediment transport, and ecological changes. Typically, EFDC modelers work in environmental consulting, research, or government agencies, supporting water resource management and environmental impact assessments. Their work is crucial in understanding complex water systems and informing decision-making.

What skills and qualifications are needed to thrive as an Environmental Fluid Dynamics Code (EFDC) modeler?

To thrive as an EFDC Modeler, you need a strong background in environmental engineering, hydrodynamics, and numerical modeling, typically supported by a degree in civil or environmental engineering or a related field. Proficiency in EFDC software, GIS tools, and data analysis platforms like MATLAB or Python is essential, along with experience in model calibration and validation. Strong analytical thinking, attention to detail, and effective communication skills help you interpret results and collaborate with multidisciplinary teams. These skills are crucial for developing accurate environmental models that inform water resource management and policy decisions.

What are common challenges faced by EFDC modelers when working on environmental water quality projects?

EFDC modelers often encounter challenges such as ensuring accurate data input, calibrating complex hydrodynamic and water quality parameters, and managing large datasets while maintaining computational efficiency. Collaboration with interdisciplinary teams—including engineers, ecologists, and stakeholders—is essential to gather required data and validate model outputs. Staying updated with software updates and regulatory requirements is also important, as these can impact project workflows and outcomes.
More about Efdc jobs
Infographic showing various Efdc job openings in the United States as of August 2026, with employment types broken down into 100% Full Time. Highlights an 50% Physical, and 50% Hybrid job distribution.

Early-Career Water Resources Engineer

Geosyntec Consultants, Inc.

Oak Brook, IL • On-site

$79K - $109K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 9 days ago


Job description

Overview

Do you want to build an impactful career to change the world for the better? 

Geosyntec has an exciting opportunity for an Early-Career Water Resources Engineer in our Oak Brook, IL office. This position is well suited for a water resources professional with hands-on experience in hydrologic, hydraulic, groundwater, and pollutant transport modeling; spatial data analysis and visualization; field monitoring; and technical reporting. The role will provide opportunities to apply civil, environmental, and water resources engineering knowledge to address real-world water quality, stormwater, watershed, and contaminant control challenges, including projects related to National Pollutant Discharge Elimination System (NPDES), Total Maximum Daily Loads (TMDLs), Combined Sewer Overflows (CSOs), data analysis, sampling, and reporting, while also building the consulting and client service skills needed for long-term career growth.

Geosyntec is an innovative, international engineering and consulting firm serving private and public-sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure. Our engineers, scientists, technical and project employees serve our clients from offices across the world. Ranked by ENR as one of the top environmental engineering design firms, Geosyntec is internationally known for its technical leadership, broad experience, and exceptional client service.

We invest in our people.  Each employee is unique, and your career at Geosyntec will be too.  We offer competitive pay and benefits, and well-being programs to support you and your family.

To Learn More Visit: http://www.geosyntec.com/careers/.

Essential Duties and Responsibilities
  • Collaborating with interdisciplinary teams of engineers, scientists, clients, agencies, and stakeholders on water resources, stormwater, water quality, contaminant fate and transport, and remediation-related projects.
  • Developing, calibrating, and evaluating hydrologic, hydraulic, groundwater, and pollutant transport models for watersheds, stream systems, stormwater infrastructure, surface-groundwater systems, and contaminated sites.
  • Applying tools such as EPA-SWMM, SWAT, HEC-RAS, EFDC, and related modeling platforms to support water quality, flooding, nutrient management, and remediation evaluations.
  • Processing, organizing, and analyzing spatial, land cover, soil, climate, hydrologic, groundwater, and water quality datasets using GIS, Python, and statistical methods.
  • Preparing maps, figures, 2D/3D visualizations, model inputs, and technical graphics to communicate complex water resources and contaminant transport findings.
  • Conducting field investigations, including surface water, sediment, and sampling; installation and maintenance of monitoring equipment; and surveying activities.
  • Managing, evaluating, and summarizing monitoring data, model results, and scenario analyses for technical teams, clients, stakeholders, and regulatory audiences.
  • Reviewing state and federal regulations, permits, and technical guidance related to surface water, groundwater, stormwater, water quality, and contaminant control.
  • Preparing technical reports, memoranda, presentations, and other client-ready deliverables.
  • Drive personal, company, and rental vehicles to client or company project or office sites, and other business locations, as needed.
Education and Licensure
  • Bachelor's degree in environmental, water resources, hydraulic, or civil engineering; natural resources science; or a closely related field. (required)
  • Advanced degree in environmental engineering, water resources science, civil engineering, or a related engineering discipline. (preferred)
  • Engineer-in-Training (E.I.T.) certification, or ability to obtain, where applicable. (preferred)
Skills, Experience and Qualifications
  • At least 2 years of related academic, research, internship, or professional experience in water resources, environmental engineering, hydrologic/hydraulic modeling, water quality modeling, groundwater modeling, or contaminant fate and transport. (preferred)
  • Experience with hydrologic, hydraulic, groundwater, and pollutant transport modeling tools such as EPA-SWMM, SWAT, HEC-RAS and EFDC, MODFLOW, MODPATH, MT3D, SWAT, PHREEQC, PFLOTRAN, or similar platforms. (preferred)
  • Proficiency using GIS and spatial analysis tools such as ArcGIS Pro, QGIS, GeoPandas, Rasterio, Google Earth Engine, or similar applications to develop model inputs, maps, and data visualizations. (required)
  • Programming and data analysis experience using Python and/or R, including tools for data processing, statistical analysis, model support, visualization, or automation. (preferred)
  • Experience using scripting, automation, machine learning, data science, or cloud-based workflows to support environmental modeling and analytics. (preferred)
  • Experience developing technical figures, maps, and 2D/3D visualizations using tools such as EVS, Adobe Illustrator, GIS platforms, or related visualization software. (preferred)
  • Field experience with surface water, sampling; installation or maintenance of gauges, piezometers, pressure transducers, or dataloggers; and survey methods. (preferred)
  • Ability and willingness to perform fieldwork and travel. (required)
  • Strong technical writing, presentation, communication, data interpretation, and problem-solving skills, including experience preparing reports, manuscripts, conference presentations, or agency/stakeholder-facing materials. (required)
  • Proficiency in Microsoft Office suite. (required)
  • Valid U.S. driver's license and a satisfactory driving record for business travel. (required)

This opportunity will be posted for at least five days. Below are the potential compensation ranges that we in good faith believe are applicable for this role at the time of this posting and are only applicable for jobs to be performed in the specified location(s) below. The typical base salary range for this position is just one component of Geosyntec's total compensation package for employees. Actual compensation will be determined based on education, experience, skill set and location.

  • Minimum Salary: $70,520/year / Maximum Salary: $102,080/year (Oakbrook, IL)

We offer a comprehensive benefits package to all eligible employees including, 9 paid holidays, 2 floating holidays, a minimum of 8 sick days, and a minimum of 11 vacation days per year, in line with state or federal requirements. Employees (and their families) are offered medical, dental, vision, life, and disability insurance, 401(k), a variety of leaves of absences and other benefits to eligible employees.

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Employment Type: FULL_TIME