Terracon meets you wherever you’re at within the lifecycle of your project.
Wherever you are in your project, we’re ready to meet you there.
Our employee-owned company is rooted in caring, excellence, and integrity on behalf of our clients, partners, and communities.
We’re explorers on a mission to transform our industry and the world around us.
We are a team that rewards innovation and curiosity, built on a culture of excellence and caring. Here are some of our stories.
Here's the latest updates and information about our company, projects, people, and charitable foundation.
See how we’re helping clients, start to finish and coast to coast
19955 Highland Vista Dr Ashburn, VA 20147-2698
For more than 25 years, Terracon’s DC Metro West office has supported development across Northern Virginia with thoughtful consulting, clear communication, and a deep understanding of local conditions. Founded in 1999 and joining Terracon in 2017, our team blends the responsiveness of a local office with the technical strength, resources, and consistency of a national firm.
Clients know us as a high‑quality partner they can rely on for complex projects. We see ourselves not just as service providers, but as consultants who help clients engineer smarter solutions and navigate challenging conditions with confidence. Our goal is to be their first call for geotechnical, environmental consulting, materials testing, and geophysical services.
DC Metro West is recognized for its strength in geotechnical engineering, construction materials services, environmental consulting, and geophysical services, supported by niche expertise that sets us apart in the region. Additionally, our team brings specialized experience in karst assessments, having had direct involvement in the development of the ASTM standard for “Preliminary Karst Terrain Assessment for Site Development.” We help clients uncover challenges early and make informed decisions that save time and money.
With in‑house subject matter experts, laboratory capabilities, and experienced department leaders, many of whom began their careers at Terracon, we deliver consistency, continuity, and technical depth on every project. Our low turnover means clients often work with the same technicians and inspectors from project to project, building trust and improving efficiency.
We also invest in technology that adds real value. Electronic field logging and GPS‑enabled data collection allow project teams and clients to access subsurface information quickly, reducing delays and eliminating unnecessary data re‑entry. The result is fewer surprises and better outcomes.
Above all, safety is foundational to how we work, for our employees and for everyone on the job site.
Our office culture is fun, diverse, cohesive, and caring. A vibrant social committee brings employees together through monthly events like happy hours, cook‑offs, volunteer days, and seasonal celebrations. From park cleanups and green team initiatives to Veterans-focused events and community gatherings, we believe that strong connections make for stronger teams.
That commitment extends into the communities we serve. DC Metro West is a Certified Virginia V3 Company and actively supports organizations and initiatives including Toys for Tots, CREW mentorship, ACEC DC, ASTM standards development, the Academies of Loudoun STEM program, Inova Blood Drives, and the Northern Virginia Science Center. Our team members are also engaged with local chambers of commerce, economic development groups, and planning and zoning committees throughout the region.
When you work with Terracon’s DC Metro West office, you gain a consulting partner committed to quality, communication, and long‑term value. We’re here to listen, advise, and deliver solutions that help projects move forward with confidence.
Katie Cox, P.E.
Operations Manager
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Dylan Nixon, P.E.
Geotechnical Department Manager
Mark Cox, P.G.
Geophysical Department Manager
Jennifer Jerolamon
Environmental Department Manager
Bill Richards, P.E.
Materials Department Manager
Become an Explorer with Terracon DC Metro West
Our team is standing by to help with your next project. Request a proposal with Terracon today.
We love building our communities and across the country - these stories represent some of our best endeavors.
For more than 25 years, Terracon’s DC Metro West office has supported development across Northern Virginia with thoughtful consulting, clear communication, and a deep understanding of local conditions. Founded in 1999 and joining Terracon in …
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