Our Team
Our team at DynamicSolutions | DCCM brings together experienced engineers, scientists, and modelers with specialized expertise in solving complex water resource and environmental challenges. With a staff composed largely of senior-level professionals, we combine deep technical knowledge with a collaborative, science-driven approach to help our clients better understand and manage complex aquatic systems.
Our multidisciplinary team includes project managers; hydrology and hydraulics, coastal, civil, and environmental engineers; geologists; biologists; and ecologists. Together, they bring extensive experience in hydrologic and hydraulic analysis, surface water modeling, sediment transport, water quality, and ecosystem modeling, supported by industry-leading tools such as HEC-SSP, HEC-DSS, HEC-RAS, and other specialized modeling platforms.
Across every project, our people are committed to applying sound science, innovative thinking, and decades of practical experience to develop technically defensible solutions for our clients.
Leadership
Julie A. Wallen
Christopher M. Wallen, MS, PG
Steve Sanborn, MS, PE
Key Staff
Andrew Stoddard, PhD
Senior Environmental EngineerAndrew is a nationally recognized environmental engineer with more than 50 years of government, academic and consulting experience in surface water quality analysis and modeling. His expertise includes nutrient enrichment, eutrophication, harmful algal blooms, hypoxia, water quality management and environmental regulatory assessments for rivers, lakes, estuaries and coastal waters. Andrew has supported projects for EPA, USACE, NOAA, USGS and state and local agencies and has extensive experience with EFDC, WASP and QUAL2K. His work also includes statistical analysis of long-term water quality trends, TMDLs, waste load allocations, numeric nutrient criteria, independent peer review and litigation support.
William McAnally, PhD, PE, D.CE, D.NE, F. ASCE
Senior Water Resources EngineerWilliam is a nationally recognized coastal engineering, sediment transport and navigation specialist with more than 50 years of professional experience. He spent 33 years with the U.S. Army Corps of Engineers Coastal and Hydraulics Laboratory, where he performed and supervised hydraulics, sedimentation and waterborne transportation studies and served as Technical Director for navigation-related research. He also taught water resources engineering at Mississippi State University and holds an Emeritus Research Professor position there. His expertise includes hydraulic and hydrodynamic modeling, sediment transport analysis and modeling, coastal and inland navigation studies, and model and software development.
Silong Lu, PhD, PE, D.WRE
Principal Water Resources Engineer and HydrologistSilong has 35 years of research and consulting experience spanning groundwater hydrology, watershed hydrology, surface water hydraulics and coastal hydrodynamics. His expertise includes groundwater flow and contaminant transport, saltwater intrusion, watershed and hydraulic modeling, surface-groundwater interaction, sediment and water quality modeling, and coastal tide and wave analysis. Silong has served as a technical reviewer, technical lead, project lead and project manager on numerous water resources projects. He brings deep experience with modeling platforms including MODFLOW, HEC-HMS, HEC-RAS, EFDC, WASP, HSPF, SWMM and MIKE SHE.
Zhijun Liu, PhD
Environmental Scientist and ModelerZhijun has 20 years of research and consulting experience in watershed hydrology, water quality and coastal hydrodynamic modeling for rivers, lakes and estuaries. His multidisciplinary background includes agronomy, ecology, forestry, and civil and environmental engineering. Zhijun has extensive experience applying watershed, hydraulic, hydrodynamic, sediment transport and water quality models, including HSPF, EFDC, WASP, QUAL2K, SWMM and HEC-RAS. He has also served as a reviewer for several professional journals focused on water resources, environmental management and coastal research.
Shuvashish Roy, MS, PE
Water Resources EngineerShuvashish is a water resources engineer with more than eight years of experience supporting projects involving rivers, floodplains, estuaries, watersheds, hydraulic infrastructure and coastal flood systems. A registered Professional Engineer in Florida, he specializes in hydrodynamic and hydraulic modeling, flood risk analysis, computational fluid dynamics, sediment and salinity transport, compound flooding, model calibration and environmental data analysis. His project experience includes estuarine restoration, reservoir and pump station hydraulics, storm surge and riverine flood interaction, watershed water-budget evaluation and large-scale river modeling. His technical experience includes EFDC, OpenFOAM, Flow-3D, HEC-RAS, HSPF, AdH, Python, R, MATLAB and Fortran.
Katelyn Keller, PE
River-Coastal EngineerKatelyn is a River-Coastal Engineer specializing in hydrodynamic, morphodynamic and sediment-transport modeling of tidal rivers, estuaries, and coastal systems across Louisiana and the South Atlantic coast. She holds a B.S. in Civil Engineering and received her M.S. in River-Coastal Science and Engineering from Tulane University, where her research focused on wetland restoration, including optimizing sediment retention and wave-attenuation devices for reduced shoreline erosion. Katelyn previously served as Hydraulic Engineer with the U.S. Army Corps of Engineers, New Orleans District, where she developed two- and three-dimensional models of the Lower Mississippi River and Gulf Coast to support salinity intrusion mitigation, flow-diversion control, storm surge risk reduction, and navigation projects. She is a registered professional engineer in the state of Louisiana.
Madoche Jean Louis, PhD
Water Resources Engineer and Coastal ScientistMadoche is a water resources engineer and coastal scientist with research and consulting experience supporting a wide range of projects related to riverine, estuarine, and coastal systems. His expertise includes 2D/3D eco-hydro-morphodynamic modeling (including salinity and temperature), water quality modeling, compound flood modeling, flood hazard assessment, nature-based solutions, and coupling machine learning with process-based models. His technical experience includes using Delft3D FM, DELWAQ, SFINCS, and Python on high-performance computing platforms to support model development, calibration, validation, and the automation of numerical modeling workflows. He has authored peer-reviewed journal publications, presented at international conferences, and served as an expert reviewer for the Intergovernmental Panel on Climate Change (IPCC) Seventh Assessment Report. Dr. Jean Louis holds a PhD in Oceanography and Coastal Sciences from Louisiana State University, an MSc in Hydraulic Engineering from IHE Delft, and a BSc in Civil Engineering in Mexico. He is fluent in English, French, and Haitian Creole.
Zachary Wallen
Water Resources EngineerZach is a water resources engineer with a Masters Degree in Civil & Environmental Engineering from the University of Tennessee. He is an expert in developing 2D and 3D models of river and estuarine systems for projects related to flood risk management, navigation, sedimentation, and ecosystem restoration. He is an expert on the AdH model, having completed numerous models throughout the country including the Mississippi River. Mr. Wallen also has expertise in spatial data analysis using GIS.