About Us
Soils Inc. is a full-service soil testing and septic design company serving Virginia. Our staff includes Professional Engineers and Master Alternative Soil Evaluators, and our work runs from single family lots to large commercial projects. Clients call us when the answer needs to be right.
The Soils Inc Company Story

Markham (Mark) D. Smith is the President of Soils, Inc., is dedicated to continuing the family tradition of providing quality work and exceptional customer service to our valued clients. Mark is a 3rd generation soil scientist who successfully works throughout the Washington Metropolitan Region. Mark graduated from North Carolina State University in 2005 with a Bachelor of Science degree in Agronomy. He is a DPOR Licensed Authorized On-site Soil Evaluator (AOSE), DPOR Licensed Professional Soil Scientist (LPSS), and a DPOR Licensed Alternative Onsite Sewage System Operator (AOSSO). Mark works closely with state and local regulators to help improve our industry.
He is a past board member of the Virginia On-site Wastewater Association (VOWRA), a current member and past board member of Virginia Association of Professional Soil Scientist (VAPSS), a current council member of the Northern Virginia Builders Association (NVBIA). Mark works with Fairfax County and the Northern Virginia Soil and Water Conservation District preparing training classes to use soil morphology to estimate seasonal high water table when conducting storm water infiltration studies. Mark has worked with NVBIA to host the golf tournament which benefits Habitat for Humanity and Fauquier Family Shelter.
As part of the work ethic for Soils, Inc, Mark believes highly in providing great customer service and performing quality work quickly.
We don’t just talk about great customer service, we provide it!
Meet the Soils Inc Team

Mark Smith

Wayne Savage

Carla Adgate
Our Core Values
Our Clients Are Our Priority
Third Generation Soil Scientists
Multi-generational expertise of third-generation soil scientists dedicated to superior soil investigation and geological practices
Decades of Combined Experience
Leverage decades of combined experience, ensuring expertly managed soil services that deliver reliability and outstanding results
Thousands of Satisfied Customers
Extensive experience serving thousands of customers across Central Virginia ensures reliable, tested solutions tailored to diverse soil management needs
Join the Soils Inc Team
Soils Inc. is a Virginia company doing field work that matters. You will work alongside licensed engineers and soil evaluators on projects from home lots to commercial sites, with room to grow as the company does.

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