CallisonRTKL is a global architecture, planning and design firm formed from the October 2015 merger of Callison and RTKL Associates, both of which were subsidiaries of Arcadis NV.[1]

Area served
Key people
Kim Heartwell (CEO)
Number of employees
Tokyo Bay Rehabilitation Hospital, Tokyo
Royal Pavilion, Aldershot

Chief Executive Officers (Effective Date)

  • Kim Heartwell (26 January 2021) [2]
  • Kelly Farrell (6 May 2019) [3]
  • Tim Neal (June 1, 2017) [4]
  • Lance K. Josal FAIA (1 September 2009) [5]



Chapman Taylor and CallisonRTKL have submitted plans for the £1.4 billion redevelopment of Brent Cross Shopping Centre in North West London.[6][7] CallisonRTKL designed the Four Seasons Residences in Beverly Grove, Los Angeles set for completion in 2019.[8] Its 5th and Hill project at Pershing Square in Downtown L.A. features cantilevered, glass-bottomed swimming pools projecting from the building's envelope.[9]


  1. ^ Bhatt, Sanjay (20 October 2015). "Callison merges into another architecture firm, HQ shifts to Baltimore". The Seattle Times. Retrieved 8 April 2016.
  2. ^ "In its 75th year, CallisonRTKL Appoints Kim Heartwell as CEO, Harold Thompson as COO". 26 January 2021.
  3. ^ "Kelly M. Farrell AIA Named President and CEO of CallisonRTKL". 6 May 2019.
  4. ^ Arcadis Appoints Tim Neal as New CEO of Callisonrtkl GlobeNewswire/Nasdaq, 8 March 2017
  5. ^ "RTKL names Lance Josal president and CEO | Building Design + Construction". 11 August 2010.
  6. ^ TIM CLARK, ELLA BRAIDWOOD Chapman Taylor and Callison RTKL lodge plans for £1.4bn Brent Cross revamp Architects Journal, 24 MAY 2017
  7. ^ Grant Prior, Race starts for first £15m Brent Cross infrastructure deal Construction Enquirer, 2017/05/25
  8. ^ BIANCA BARRAGAN, Construction on Four Seasons condos in Beverly Grove underway this week: The development includes a $50-million penthouse Curbed, MAY 30, 2017
  9. ^ ANTONIO PACHECO, CallisonRTKL proposes Jenga-shaped tower for Downtown L.A. The Architect's Newspaper, October 11, 2016