CallisonRTKL is a global architecture, planning, and design firm that specializes in creating innovative and sustainable solutions for clients in a wide range of industries. The company was founded in 1946 and has since grown to become one of the largest architecture firms in the world, with offices in North America, Europe, Asia, and the Middle East. CallisonRTKL's team of experts has extensive experience in a wide range of sectors, including commercial, healthcare, hospitality, and retail. The company is committed to delivering high-quality solutions that meet the unique needs of each client. CallisonRTKL is headquartered in Arlington, Virginia, and is a subsidiary of Arcadis NV, a global design and consultancy firm.