ATCS is a leading professional engineering consulting firm providing roadway design, traffic engineering, planning, environmental, construction management and inspections, surveying, site civil, and emergency management services since 1994.

With eight offices across Pennsylvania, Maryland, Virginia, and North Carolina, we have access to expert resources to design, build, plan and manage the successful delivery of our clients’ projects and programs.


  • ENR Top 100 Construction Management Firm
  • ENR Top 500 Design Firm in the nation
  • Washington Business Journal as #8 Largest Engineering firm in Greater D.C
  • Washington Post named ATCS a 2020 Top Workplace

ATCS believes in enabling our clients, employees, and communities to flourish.