About Three Oaks Engineering

Our History

Three Oaks Engineering was founded in 2014 by consulting engineering professionals with a desire to create the kind of workplace where they wanted to work, with a focus on helping clients accomplish infrastructure projects with careful consideration of community and environmental needs. The company would be a sustainable partner in the community, while providing employees the flexibility to balance business and family responsibilities.

In 2015, The Catena Group joined Three Oaks, expanding the company’s offerings to include a broad range of environmental work, including specialized threatened and endangered species surveys, ecological/habitat evaluations, wetland and stream delineations, and environmental permitting.

Three Oaks has since grown to 50 staff across three offices – American Tobacco Campus in Durham (headquarters), Centennial Campus in Raleigh, North Carolina, and Columbia (West Cayce), South Carolina. This growth includes the addition of new services to better support our clients, including traffic engineering, hydraulic design, and roadway and multi-modal design.

With experience on a wide range of projects across the Southeast, coupled with a positive approach and commitment to each client, Three Oaks offers superior, cost-effective, and efficient services.  

The company has been recognized for its sustainability practices and is a disadvantaged business enterprise (DBE) with the North Carolina, South Carolina, and Virginia state departments of transportation.


  • NCDOT disadvantaged business enterprise (DBE) & small professional services firm (SPSF)
  • NC Department of Administration Historically Underutilized Business (HUB)
  • City of Durham Woman Small DBE & Small Local Business Enterprise (SLBE)
  • Virginia DBE and Small, Woman-owned, and Minority-owned (SWaM) Business woman/small certified
  • US Small Business Administration Economically Disadvantaged Women-Owned Small Business (EDWOSB) 

Our Core Values

The name Three Oaks Engineering and our symmetric logo convey balance and interconnectedness, and symbolize our three core values:

Work-Life Balance

Logo for Three Oaks Engineering
three acorns with oak leaves


Our name honors the oak tree, a symbol of strength and renewal.  We assist clients in balancing infrastructure and development objectives with long-term community and environmental needs.  We also strive to be sustainable partners in our own communities.

group photo of Three Oaks staff at bicycle event

Work-Life Balance

We provide our employees with the flexibility to balance business and family responsibilities.  Our strong belief is that empowering highly-motivated employees is good for business.

I-526 bridge over Wando River Charleston


We will succeed by focusing on delivering exceptional products and superior client service, while at the same time providing for the growth and well-being of our employees.   While profitability is vital, we recognize that our clients and employees are the cornerstones to our long-term success, and we are committed to providing both with what they need to flourish.

Recognition & Awards

Three Oaks Engineering ensures nondiscrimination in all programs and activities in accordance with Title VI of the Civil Rights Act of 1964.  If you need more information or special assistance for persons with disabilities or limited English proficiency, contact our office at 919.732.1300.

This link leads to the machine-readable files that are made available in response to the federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine readable files are formatted to allow researchers, regulators, and application developers to more easily access and analyze data.