Todd Guerdat, PhD — Environmental Engineer
Environmental & Civil Engineer · Wetland Scientist · Conservation Practitioner · Seacoast New Hampshire
PhD, Biological & Agricultural Engineering — NC State University
20 Years of Environmental Engineering Practice
Todd Guerdat brings an unusual combination of federal engineering experience, academic research background, and active hands-on field work to environmental consulting in the Seacoast New Hampshire region.
His PhD in Biological and Agricultural Engineering (Civil/Environmental Engineering) provides the analytical foundation for complex data analysis, hydrologic modeling, and systems-level problem solving. His five years with USDA NRCS as an Environmental and Civil Engineer provided direct experience with wetland delineation, conservation practice design, and federal regulatory programs under the Clean Water Act, Endangered Species Act, and the National Engineering Manual.
As an Agricultural Engineering faculty member at the University of New Hampshire, Todd bridged research and applied practice — developing curricula in sustainable agriculture, water systems, and land stewardship.
Today, GSS combines all of this in an independent consulting practice focused on delivering senior-level technical capability to engineering firms, conservation organizations, and regulated industries — without the overhead and scheduling friction of a large firm.
NH Certified Wetland Scientist (CWS)
Application submitted to NH OPLC Board of Natural Scientists. Required for NH wetland delineation work.
NRCS Technical Service Provider (TSP)
USDA TSP application in process. Enables federally funded EQIP/AMA/CSP technical assistance.
PhD, Biological & Agricultural Engineering
NC State University. Civil/Environmental Engineering. Focus: water systems, biological production.
NH Certified Soil Scientist (CSS)
Same board as CWS. Expands billable services to soil mapping and septic site evaluations.
Career Timeline
Principal Consultant — Guerdat Sustainable Solutions, LLC
Environmental consulting, conservation land services, and landcrafting construction. Active groundwater characterization project at NHDES/EPA-regulated hazardous waste site. Biosolids and nutrient management consulting. Seacoast NH.
Environmental & Civil Engineer — USDA Natural Resources Conservation Service
Federal conservation practice design and technical work across multiple states. Wetland delineation, conservation practice design and installation oversight, federal policy development under CWA, ESA, and the National Engineering Manual. EQIP, AMA, and CSP program technical assistance.
Agricultural Engineering Faculty — University of New Hampshire
Courses in sustainable agriculture engineering, water systems management, and land stewardship. Applied research in aquaponics, water quality, and conservation practice effectiveness. Durham, NH.
R&D, Nutrient Management / Water Treatment - Private Sector
Developed and commercialized water and waste treatment systems for breweries, wineries, and commercial scale aquaculture. Research focus: water quality, biological systems, sustainable agriculture, bioelectrochemical systems (microbial fuel cells), integrated aquaculture and hydroponic systems.
Areas of Deep Expertise
Hydrology & Groundwater
- Groundwater monitoring program design
- Contaminant plume characterization
- Water table mapping and analysis
- GMP development and review
- NHDES regulatory familiarity
Wetlands & Soil Science
- Wetland boundary delineation (NRCS methods)
- Hydric soil identification
- Vernal pool assessment
- Soil profile description and mapping
- CWS certification in progress
Conservation Technical Practice
- NRCS practice design (EFO, WW, DP, more)
- Erosion and sediment control
- Drainage design and hydraulics
- Agricultural waste management
- EQIP/AMA/CSP program technical assistance
Water Systems & Aquaculture
- Recirculating aquaculture system design
- Water quality management
- Aquaponics system design
- Water/wastewater treatment
- NPDES aquaculture permitting
NH Association of Natural Resource Scientists — the critical professional network for CWS-adjacent work, referrals, and peer connections across the state's environmental science community.
Soil and Water Conservation Society membership and ongoing connections with the NH NRCS State Office from federal service — directly relevant for TSP certification and farm project referrals.
Active applicant for NH Certified Wetland Scientist (CWS) and Certified Soil Scientist (CSS) — both through the NH Office of Professional Licensure and Certification.
Ready to explore a working relationship?
A 30-minute call is the best starting point — no forms, no waiting. We'll talk through your project's technical needs and what a subcontract engagement could look like.