Engineering With Large Language Models

with William Mark Katzenmeyer, P.E., C.F.M.

AI/LLM Innovator and H&H Modeling Expert

📍 New Haven, Connecticut | LinkedIn Profile

PROFESSIONAL SUMMARY

Senior Water Resources Engineer with 16+ years of experience in hydraulic modeling, flood risk management, and automation development. Creator of HEC-Commander tools, an open-source suite leveraging AI to automate HEC-RAS and HEC-HMS workflows. Expert in FEMA grant management, Benefit-Cost Analysis (BCA), and applying Large Language Models to engineering workflows. Recognized speaker and instructor on AI applications in water resources engineering.

EDUCATION

Bachelor of Science, Civil Engineering Mississippi State University, Bagley College of Engineering

December 2008

PROFESSIONAL LICENSES & CERTIFICATIONS

Professional Engineer (PE):
  • Louisiana #36775
  • Texas #149506
  • Connecticut #36844
  • New Mexico #28964
  • Arkansas #21921
  • Oklahoma #34244
Certified Floodplain Manager (CFM): #US-21-11950
NCEES Status: NCEES Record is Active and Current

PROFESSIONAL EXPERIENCE

CAREGIVING

Career Break New Haven, Connecticut

February 2025 - Present
  • Welcoming newest family addition

C.H. FENSTERMAKER & ASSOCIATES, LLC

Senior Water Resources Technical Lead Remote - Connecticut

June 2023 - February 2025
  • Led technical aspects of Louisiana Watershed Initiative Region 4 modeling efforts, supervising 6 HUC-8 level watershed models
  • Developed AI-driven Python tools for HEC-RAS and HEC-HMS automation, achieving over 350% faster runtimes compared to cloud-based platforms
  • Created innovative workflows to overcome technical challenges in HEC-RAS, including standardized structure modeling logs and boundary conditions spreadsheets
  • Initiated and contributed to PIANC Digital Twin Task Subcommittee, using LLMs for literature review and brainstorming
  • Instructed multiple technical courses for Australian Water School on AI applications in water resources, including "Applying AI to HEC-RAS Modelling Workflows" and "AI Tools for Modelling Innovation"
  • Optimized water resources IT infrastructure resulting in 10x improvement in computational throughput for LWI Region 4 modeling efforts
  • Supervised RAS modeling for 6 HUC-8 level watershed models, providing technical oversight of all deliverables
  • Led Whisky Chitto HUC modeling team, successfully meeting programmatic deadlines with minimal QA/QC issues
  • Developed python-based methods for low-detail LIDAR filtering to improve model computational efficiency
  • Created boundary conditions spreadsheet tool to generate direct inputs for the RAS .u unsteady flow files, managing over 480 boundary conditions

Engineer II New Orleans, Louisiana

January 2021 - June 2023
  • Created and published HEC-Commander tools, an open-source suite of Python notebooks using AI-assisted coding on GitHub
  • Led Calcasieu Parish residential mitigation project, successfully funding 95 properties through innovative BCA approaches
  • Pioneered the first successful application of Sea Level Rise in FEMA BCA in Region 6
  • Presented at Louisiana Floodplain Management Association Annual Conference (2023) on FEMA BCA 6.0 Tool updates
  • Developed the preliminary model setup for 2D rain-on-grid model for Calcasieu Parish Stormwater Master Planning
  • Provided FEMA BCA technical support for Calcasieu Parish, resulting in development of ArcGIS python script for damage estimate calculations
  • Produced H&H studies and Phase 1 BCA Analysis for City of Baker HMGP Drainage Projects
  • Provided ongoing technical BCA assistance to Jefferson Parish for residential structure mitigation, pump station upgrades, drainage projects, facility generator projects, and green infrastructure projects

QUALITY ENGINEERING & SURVEYING, LLC

Water Resources Manager Port Vincent, Louisiana

August 2020 - January 2021
  • Managed water resources department focusing on municipal HMGP projects and residential land development
  • Led team preparing 22 Phase I HMGP applications for Puerto Rico municipalities (Caguas, Loiza, Aibonito, Isabela and Dorado)
  • Developed H&H studies, BCAs, and watershed analyses for multiple drainage improvement and pumping station grant projects
  • Prepared Phase II H&H Study for Bayou Conway Pumping Station HMGP project, including 700CFS additional capacity
  • Developed existing HEC modeling and watershed study for Breaux Bridge Manor and Long Slash Branch Watershed
  • Led 36 Phase I HMGP/CDBG applications for Livingston Parish Gravity Drainage Districts, City of Denham Springs, and City of Lutcher
  • Provided forensic hydrologic investigations and plan review services for Livingston Parish Gravity Drainage District
  • Prepared Hydraulic (HEC) models for multiple residential and commercial developments, including LOMR applications

STUART CONSULTING GROUP, INC.

Civil Engineer P.E. / Disaster Grant Management Metairie, Louisiana

August 2016 - June 2017
  • Technical Guidance for $70M of Roadway, Water and Sewer Infrastructure Combined Improved Project (PA Grant) for City of Slidell (DR-1603)
  • Provided technical assistance during design of City Barn Pump Station Project (HMGP)
  • Managed scope and cost alignment, closeout documentation, and version requests for all post-Katrina Project Worksheets
  • Led team in charge of closeout for Lafon Nursing Home Katrina Project Worksheets, including revisions to hazard mitigation proposal funding
  • Managed damage assessment, scope development, and hazard mitigation proposal development for Tangipahoa Parish Sheriff's Office
  • Performed technical review of scope/cost alignment of version requests involving major roadway reconstruction and FHWA funding
  • Conducted technical and value engineering reviews for roadway, water and sewer infrastructure projects

LINFIELD, HUNTER AND JUNIUS, INC.

Civil Engineer P.E. Metairie, Louisiana

January 2008 - August 2016
  • Contributed to design documents for canal improvements including 17th Street Canal Widening with pile-supported concrete floodwall
  • Civil design for Hoey's Canal Bypass and Improvements including 1,800 feet of sheet pile lined pile-supported concrete flume
  • Designed subsurface drainage systems and roadway reconstruction projects, including Cuddihy Drive And Woodvine Avenue
  • Managed construction of critical drainage infrastructure and flood protection projects, including HMGP-funded roadway elevations
  • Prepared H&H studies for urban drainage improvements and perimeter protection for critical infrastructure
  • Civil responsibilities for stormproofing measures for drainage pump stations, including OSP-05 and OSP-10
  • Led civil design for Port Of New Orleans Drainage Study and Audubon Park Drainage System Study
  • Provided hydraulic modeling for developments within floodplains and floodways in Louisville, KY and Houston, TX
  • Designed water and sewer pipelines, including 20" waterline relocation (25,000 LF) and sewage plant expansion
  • Conducted forensic engineering investigations for residential damage surveys and insurance claims

U.S. ARMY CORPS OF ENGINEERS

Co-op/SCEP/Contract Student Coastal and Hydraulics Laboratory, Waterways Experiment Station, Vicksburg, MS

June 2001 - August 2007
  • Contributing author on "Effects of Pool Drawdown and Wing Dams (Pool 8), and Closure Dams (Pool 13), on Navigation Channel Sedimentation Processes, Upper Mississippi River"
  • Utilized 2D/3D hydrodynamic modeling with Adaptive Hydraulics (ADH) and high-performance computing resources
  • Operated and maintained large-scale physical hydraulic models (scales 1:5 to 1:30) of dams, spillways, and channels
  • Participated in bathymetric surveying in the Missouri River Basin using multibeam, side scan sonar, and acoustic doppler velocimeter
  • Assisted with training courses for Surface Water Modeling System (SMS) software packages
  • Performed flume studies for sediment modeling and sieve analysis of sediment samples following ASTM guidelines
  • Processed field data for integration with numerical modeling efforts for sediment transport studies

TECHNICAL SKILLS & EXPERTISE

Leadership & Innovation

  • Strategic Vision & Technical Leadership
  • Organization-wide AI/LLM Tool Adoption
  • QAQC Standards Implementation
  • Technical Team Management (7-10 Staff)
  • Cross-functional Team Collaboration
  • Open-source Innovation Leadership

Water Resources Engineering

  • HEC-RAS (1D/2D) Modeling & Automation
  • HEC-HMS Hydrologic Modeling & Calibration
  • Floodplain Management & FEMA Compliance
  • Watershed Analysis & Stormwater Master Planning
  • Coastal Transition Zone Analysis

Grant Management & BCA

  • FEMA Hazard Mitigation Grant Program (HMGP)
  • Public Assistance (PA) Projects
  • FEMA BCA Toolkit 6.0 Expert
  • Sea Level Rise Documentation & Analysis
  • Green Infrastructure Calculators

Software Development & AI

  • Python Notebook Development
  • AI-Assisted Coding & Workflow Automation
  • H5py/HDF Data Processing
  • Jupyter Notebook Engineering Tools
  • GIS Data Processing & Analysis

NOTABLE PROJECTS & ACHIEVEMENTS

HEC-Commander Tools Development

  • Created open-source Python-based automation tools using AI-assisted coding
  • Developed RAS-Commander for parallel execution of HEC-RAS plans
  • Created HMS-Commander for automating calibration workflows
  • Published "Terrian Mod Profiler" for optimizing 2D model performance
  • Automated 2D model infiltration parameter sensitivity testing

Louisiana Watershed Initiative - Region 4

  • Served as Senior Technical Lead for QAQC of 6 HUC-8 watershed models
  • Developed technical innovations including standardized structure modeling logs
  • Created automated workflows for boundary conditions management
  • Implemented Python-based methods for low-detail LIDAR filtering for computational efficiency
  • Optimized hardware deployment for 10x improvement in computational throughput

PRESENTATIONS & INSTRUCTION

Presentations

  • Association of State Floodplain Managers National Conference (2025)
    • Presenting on the RAS-Commander library
    • Leading 4-hour workshop: "ChatGPT for H&H Data Management"
  • Association of State Floodplain Managers Conference (2024, 2025)
  • Louisiana Floodplain Management Association Annual Conference (2023, 2024)
  • WEF Webinar: "AI/ML Through A Watershed Lens" (February 2025)
  • The Full Momentum Vodcast: "The Future of Leveraging HEC-RAS with Automation and AI" (2024)

Instruction

  • Australian Water School - Lead Technical Instructor
    • Comprehensive Series on AI Applications in Water Resources:
    • "Applying AI to HEC-RAS Modelling Workflows" (July 2024)
    • "AI Applications to HEC-RAS Modelling Workflows" (August 2024)
    • "AI Tools for Modelling Innovation" (February 2024)