Updated: Nov 18, 2025
Location
Headquarters Address
2101 L Street NW, Suite 200, Washington, DC, 20037
Local address
Washington, DC, 20037
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Callisonrtkl Architect
Callisonrtkl Inc, (Employees: David Francis Cassidy and Matthew Richard Usbeck) holds a Architect license and 3 other licenses according to the Arizona license board.
Their BuildZoom score of 91 ranks in the top 37% of 14,657 Arkansas licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Callisonrtkl Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Callisonrtkl Inc Services
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Callisonrtkl Inc Contact Information
Phone Number: (202) 833-4400
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Callisonrtkl Inc License info
Verified License
| License # | 22315 |
| Status | Active |
| State | Arizona |
| Type | Architect |
- BuildZoom verified this license was active as of June 2025.
Verify this license's status for Callisonrtkl Inc at the Arizona Board of Technical Registration.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | C228 |
| Status | Active |
| State | Arkansas |
- BuildZoom verified this license was active as of April 2025.
Verify this license's status for Callisonrtkl Inc at the Arkansas State Board of Architects, Landscape Architects, and Interior Designers.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 000207 |
| Status | Active |
| State | Missouri |
| Type | Architectural Corporation |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Callisonrtkl Inc at the Board For Architects, Professional Engineers - Missouri .
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CA-1201 |
| Status | Active |
| State | Nebraska |
| Type | Architect |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Callisonrtkl Inc at the Nebraska Board of Engineers and Architects.
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
Callisonrtkl Inc Employees
DC
David Francis Cassidy
Architect
MU
Matthew Richard Usbeck
Architect