Engineering, Architecture, Planning

TKDA is a full-service engineering, architectural and planning firm headquartered in Saint Paul Minnesota.

Our offices:

  • Saint Paul, MN (headquarters)
  • Duluth, MN
  • Irvine, CA
  • Chicago, IL
  • Tampa, FL
  • Kansas City, KS

We're 100% employee owned. And our more than 200 employees are passionate about achieving the highest levels of engineering, architecture and planning excellence.

Our employees:

  • Number of employees: 200+
  • Registered engineers: 68
  • Registered architects: 18
  • LEED accredited staff: 18

Loyal customers come back to us for their next project…and the next. They tell us they appreciate being able to access integrated services from a single source. And they rely on our experience and expertise in their industry.

Markets served:

  • Architecture
  • Government
  • Transportation
  • Energy Solutions
  • Water

We've had more than 100 years experience bringing the right people to the job.

Management team:

  • William E. Deitner,
    P.E., S.E., CEO
  • Vincent T. Montgomery,
    P.E., President
  • Kevin R. Cullen,
    P.E., VP, Surface Transportation
  • John W. Ahern,
    P.E., VP, Aviation
  • Larry D. Bohrer,
    P.E., VP, Municipal Services
  • Thomas S. Stoneburner,
    P.E., S.E, LEED AP, VP, Facilities
  • Bret M. Farmer,
    P.E., VP, Rail
  • Greg Barlow,
    SPHR, VP, Human Resources
  • Christine A. Wiegert,
    VP, Marketing/Business Development
  • Dean Gratz,
    VP, Finance

  • Founded: 1910