CallisonRTKL Email Format

Architecture and PlanningNorth Holland, Netherlands201-500 Employees

CallisonRTKL is an architecture and planning practice based in Amsterdam, North Holland. It has joined Arcadis, creating one of the world's largest architecture practices. The combined organization emphasizes sustainable design, social impact, and digital innovation across natural and built environments.

Its client base includes developers, retailers, investors, institutions, and public entities. The arrangement positions the firm to address complex urban challenges and help shape the cities and communities of tomorrow. The integration follows Arcadis’ broader expansion in Northern Europe, including a recent increase in its Manchester presence.

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