Callison was an international architecture firm based in Seattle, Washington. Callison was founded by Tony Callison in 1975 and grew to 900 employees around the world prior to its acquisition by Arcadis NV in 2014. In October 2015, Callison was formally merged with another Arcadis subsidiary, RTKL Associates, to form CallisonRTKL headquartered in Baltimore, Maryland.[1]
Callison planned and designed retail, hospitality, mixed-use, workplace, corporate and healthcare projects worldwide.
In August 2014, Callison announced it would be acquired by Arcadis NV, a global design, engineering and management consulting firm based in Amsterdam.[2]
Shortly after the acquisition Arcadis began marketing Callison together with another recent acquisition, Baltimore-based RTKL, with a combined "CallisonRTKL" website and press releases.[3] In October 2015, the two firms were formally merged to form CallisonRTKL headquartered in Baltimore, Maryland. At the time of the merger, the two firms together had together booked $402.4 million in architecture and engineering revenue in the prior year, and Architectural Record ranked the combined firms fifth in the nation.[1]
Callison has been recognized with awards for design,[4][5] architecture,[6] and green design.[7]
Nordstrom - Since 1975 Callison has provided the retailer (both companies are based in Seattle) the design for more than 155 new and remodeled stores; and continues to complete 10 projects, on average, every year for the company.
