RTKL Associates

In October 2015, RTKL was formally merged with another Arcadis subsidiary, Seattle-based Callison, to form CallisonRTKL headquartered in Baltimore.

[3] In 1949, the pair hired Charles E. Lamb, whose design for the Anne Arundel County Girl Scouts Teepee Lodge gained the firm national attention by winning an award from the American Institute of Architects.

In that same year RTKL was commissioned to design the public spaces for the Charles Center, which contributed to Baltimore’s urban renewal movement.

Largely because of the success of this involvement, the firm was commissioned to develop downtown plans for Cincinnati, Ohio, Hartford, Connecticut, and Charlotte, North Carolina, among other U.S. cities.

[7] In 2007, RTKL became a wholly owned subsidiary of Arcadis NV, an international company that delivers consulting, design, engineering, urban planning, architectural and project management services for infrastructure, environment and buildings.