Callison
Architectural firm
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. Wikipedia
Parent organization: Arcadis
Headquarters: Seattle, WA
Founder: Tony Callison
Founded: 1975, Seattle, WA
Number of employees: 900 (2012)
Source: S&P Global Market Intelligence