Christiaan began his career at the architectural office of Kevin Roche John Dinkeloo and Associates in Connecticut after graduating from the College of Architecture and Urban Planning at The University of Michigan. As a senior project manager at KRJDA, he worked with a global clientele on a diversity of award winning museum and office projects including the Metropolitan Museum of Art (New York), The Museum of Jewish Heritage (New York), The Abby Aldrich Rockefeller Folk Art Museum (Williamsburg, VA), Bouygues World Headquarters (Versailles, France), and the Banco Santandar Headquarters (Madrid, Spain). After 13 years with the firm, Christiaan established his own architectural firm where he designed significant projects for the University of New Haven, Hamden Hall Country Day School, Cosi Restaurants and Holiday Inn Hotels.

In 2013 Christiaan returned to KRJDA as principal. He oversaw the design of the 2,300,000 SF mixed used Capitol Crossing development in Washington, DC, the Doha Cruise Port Terminal in Doha, Qatar and the MJH Residential Tower in New York City.

Christiaan is married with two children. His wife is an accomplished interior designer, his daughter is in a graduate program for Public Policy and his son majors in International Business.