Callison
Callison's Overview
CallisonRTKL (CRTKL) is a global architecture, planning, and design practice. Formed from the merger of Callison and RTKL, the firm combines a rich legacy of design excellence with a forward-thinking approach to create memorable and successful environments for developers, retailers, investors, institutions, and public entities worldwide. CRTKL's expertise spans multiple sectors including retail, residential, workplace, healthcare, hospitality, and mixed-use, focusing on human-centric design and sustainable solutions.
Where is Callison's Headquarters?
HQ Function
Serves as a key design hub for CallisonRTKL, particularly strong in retail, mixed-use, and commercial sectors. It's one of the firm's global leadership centers and supports client projects across the Pacific Northwest and internationally.
Notable Features:
Located in the 1420 Fifth Avenue Plaza, a prominent skyscraper in downtown Seattle, offering modern collaborative workspaces with views of the city and Puget Sound. The office environment is designed to foster creativity and teamwork.
Work Culture:
A dynamic, collaborative, and creative environment that encourages innovation and design excellence. The culture reflects CallisonRTKL's commitment to cutting-edge solutions and a client-centric approach, with a focus on employee growth and well-being.
HQ Significance:
This location represents the legacy of Callison, one of the foundational firms of CallisonRTKL. It continues to be a vital center for design talent, a significant office in the company's global network, and a hub for innovation on the West Coast.
Values Reflected in HQ: The office design and operations emphasize collaboration, creativity, technological integration, and sustainability, reflecting CallisonRTKL's core values of design excellence, innovation, and responsibility.
Location:
CallisonRTKL operates as a unified global consultancy with a network of offices and design studios strategically located across North America, Latin America, Europe, the Middle East, and Asia. This extensive presence enables the firm to provide comprehensive architecture, planning, interior design, branding, and strategic services to a diverse international clientele. They support projects from initial concept through to completion and operation worldwide, combining local market understanding with global best practices.
Street Address:
1420 Fifth Avenue, Suite 2400
City:
Seattle
State/Province:
WA
Country:
USA
Callison's Global Presence
London, United Kingdom
Address: The Brew House, 123 Southwark Street, London SE1 0SW, UK
Supports clients across the United Kingdom and continental Europe, leveraging local market knowledge and global expertise to deliver impactful design solutions.
Shanghai, China
Address: 32/F, Maxdo Centre, 8 Xingyi Road, Changning District, Shanghai 200336, China
Serves as a strategic gateway to the Chinese market and the broader Asia-Pacific region, delivering comprehensive design services tailored to local cultures and client needs.
Washington D.C., USA
Address: 2101 L Street NW, Suite 200, Washington, D.C. 20037, USA
Serves clients in the Mid-Atlantic region and contributes to national and international projects, with a strong focus on sustainable urban development and government-related work.
Buying Intent Signals for Callison
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Executive Team of Callison
As of April 2025, Callison' leadership includes:
Investors of Callison
Callison has been backed by several prominent investors over the years, including:
Executive New Hires/Exits in the Last 12 Months
CallisonRTKL focuses on strategic leadership development and internal promotions, with targeted external hires for key specialized executive and director-level roles. While major C-suite turnovers are infrequent, the firm actively strengthens its leadership in various practice areas and regions to drive growth and innovation. Recent activities include promotions to global practice leadership and key regional director appointments.
New Appointments:
Technology (Tech Stack) used by Callison
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Callison Email Formats and Examples
CallisonRTKL (CRTKL) primarily uses the [first].[last]@callisonrtkl.com email format for its employees. This is a common and professional structure for corporate communications.
[first].[last]@callisonrtkl.com
Format
jane.doe@callisonrtkl.com
Example
90%
Success rate
News and media
Arcadis News • February 7, 2024
CallisonRTKL (CRTKL) appointed as lead design consultant for the Diriyah Square – DQCM1 Super-Basement project by Diriyah Company.
Arcadis’ architecture and design firm, CallisonRTKL (CRTKL), has been appointed as lead design consultant for the Diriyah Square – DQCM1 Super-Basement project by Diriyah Company. This significant project involves complex design and engineering for a large-scale development in Saudi Arabia....more
Healthcare Design Magazine • November 28, 2023
CallisonRTKL-designed Valley Children's Hospital, Eagle Oaks Medical Office Building recognized with Healthcare Design Award.
The Eagle Oaks Medical Office Building at Valley Children’s Hospital, designed by CallisonRTKL, received recognition in the 2023 Healthcare Design Awards, highlighting the firm's excellence in healthcare architecture and design....more
CallisonRTKL News • October 16, 2023
CallisonRTKL and The University of Arizona Study the Future of Retail and Consumer Behavior
CallisonRTKL collaborated with the University of Arizona's Terry J. Lundgren Center for Retailing to research evolving consumer behaviors and their impact on the future of retail environments, publishing insights to guide retail design strategies....more
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