Guerdat Sustainable Solutions · Newfields, NH

Resilient land. Resilient systems.
Built with experience. Backed by science.

Todd Guerdat, PhD: With 20+ years of applied engineering science, a PhD, and five years as a USDA NRCS civil engineer, Todd designs the work and is on site for every project. Nothing gets lost between the plan and the product. Two ways to work together:

For Your Property

Landcrafting

Drainage, driveways, greenhouses, gardens, lawns, and soil — built to hold up through New Hampshire seasons.

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Technical Consulting

Groundwater, wetland science, environmental data analysis, and NRCS conservation practice — specialist subcontract depth.

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Education PhD, Biological & Agricultural Engineering — NC State University
Federal Service Former USDA NRCS Civil Engineer · UNH Agricultural Engineering Faculty
The Difference The person who understands the science is the one doing the work
Why GSS

The Reasons It Lasts Are the Ones You Can't See

Most work fails where the science was skipped — the layer under the gravel, the grade that moves the water, the soil under the seed. GSS is built on understanding those things, and on the same person carrying that understanding from the first site visit to the final grade.

Understanding First

A PhD in agricultural & biological engineering and five years as a USDA NRCS civil engineer mean the work is sized for your soils, water, and load — not built from a rule of thumb.

One Person, Start to Finish

Todd walks the site, designs the solution, and is on the equipment for the critical work — bringing in trusted crew when the scope calls for it. No translation lost in a handoff.

A Written Scope, No Surprises

Every property project begins with a free on-site visit and a clear, written scope and price before any equipment moves. You know what you're getting and what it costs.

For Your Property

Landcrafting Services

Property work built to endure — each service designed around how your land actually drains, holds, and grows.

Perforated drain pipe laid in clean crushed stone with geotextile burrito wrap, ready for backfill. GSS drainage, Seacoast NH.

Drainage & Water Management

Stop water pooling in the yard or working toward the foundation — geotextile, geogrid, and grading sized for your site.

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Finished gravel driveway curving to a home — geogrid-reinforced, GSS New Hampshire

Driveways & Access Roads

Geogrid-reinforced, multi-layer gravel driveways that stop the annual re-gravel cycle — optional granite cobble aprons.

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Finished greenhouse with deer-proof fenced garden enclosure — GSS, Newfields NH

Greenhouses & Season Extension

Greenhouses sited and built to actually produce — sun, drainage, and airflow planned with a CEA research background.

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Cedar raised beds with gravel pathways inside a fenced garden — GSS New Hampshire

Gardens & Raised Beds

Deer- and critter-proof fenced gardens, cedar raised beds, and clean gravel paths — laid out for real growing.

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Graded lawn seedbed prepared for renovation — soil-first lawn work by GSS

Lawns & Grass Alternatives

Soil-first lawn renovation and seeding — plus clover and native perennial lawns that need less water and mowing.

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Healthy soil and bed preparation — soil health is the foundation of GSS property work

Soil Health

The foundation under everything — testing, correction, and living-soil practices that make the rest of the work succeed.

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20+Years of Applied Practice
PhDBiological & Agricultural Engineering
5 yrsUSDA NRCS Civil Engineer
1 hrProperty Service Radius · Newfields NH
Recent Work

A Few Projects From Around the Seacoast

A family in front of their finished greenhouse and raised-bed garden — GSS, Newfields NH
Greenhouse & raised-bed garden — Newfields, NH
Cape-style home with a finished white gravel driveway, cobble border, and granite-post mailbox, GSS New Hampshire
Finished gravel driveway with cobble border, coastal Cape home
Geogrid-reinforced gravel driveway with a granite cobble apron — GSS, New Hampshire
Geogrid gravel driveway with granite cobble apron
Finished foundation and yard drainage, regraded gravel apron — GSS, Seacoast NH
Foundation & yard drainage — regraded to shed water
Cedar raised beds and gravel paths inside a deer-proof fenced garden — GSS
Cedar raised beds & deer-proof fenced garden
Resilient gravel driveway curving to a home — built to last by GSS, NH
A resilient gravel driveway, built to last
Stream restoration earthwork — conservation practice implementation by GSS
Conservation earthwork & stream restoration
Ripe strawberries on weed barrier in a productive raised-bed garden, GSS Newfields NH
Productive kitchen gardens, built to feed a family
Circular stone driveway feature with cobble border at a navy Cape home, GSS New Hampshire
Custom stone driveway feature with cobble border
Custom hoop greenhouse attached to a cedar-shingled cottage shed, GSS greenhouse build
Custom greenhouse and cottage shed build
Stream restoration earthwork — conservation practice implementation by GSS, New Hampshire
Conservation Runs Through Everything

Land Stewardship, Built In

Conservation isn't a separate service line — it's the lens on every project, from a homeowner's drainage swale to a farm's grassed waterway. Todd's five years as a USDA NRCS civil engineer mean conservation practices are built to the exact federal standards that pass inspection.

GSS is pursuing NRCS Technical Service Provider (TSP) certification, which will let farms and landowners fund eligible practices through EQIP, AMA, and CSP — designed and built right the first time.

Conservation & NRCS Work Technical Consulting
For Firms & Organizations

A Trusted Extension of Your Technical Team

For engineering firms, land trusts, conservation districts, and regulated industries, GSS provides specialist subcontract depth — active regulatory project experience and the analytical rigor of a graduate engineering program, available when you need it.

  • Environmental data analysis & regulatory report writing
  • Groundwater monitoring & GMP development (active NHDES/EPA site)
  • Wetland delineation — NH CWS certification pending
  • NRCS conservation practice design & inspection (TSP in progress)
  • Biosolids & nutrient management; soil science & mapping
  • Also: independent battery storage design for existing solar PV
Todd Guerdat, PhD — Principal, Guerdat Sustainable Solutions
About Todd

The Science and the Shovel, Same Person

Todd Guerdat holds a PhD in Biological & Agricultural Engineering from NC State, served five years as a USDA NRCS civil engineer, and taught controlled-environment agriculture as UNH faculty. He grows on his own farm in Newfields and brings that same hands-on understanding to every client's property.

It's a rare combination — graduate-level science and federal conservation experience, paired with someone who'll actually be on the equipment when your project gets built.

"Understand the site, design it properly, build it right the first time. It costs less than doing it twice."
— Todd Guerdat, PhD