Willem Houck


Willem is a bit of a medical chameleon: he’s the founder and operator of a medical devices company, a medical payment reform company and a medical packaging company. In short, a true entrepreneur with a focus on innovation. He’s also extremely competitive. Imagine how he felt when his 8 year-old daughter beat him at tennis. Bouncing back from defeat, he took up tennis lessons. He needed 2 years to match her level. Last, but by no means least, he’s proud of the growth in TNC membership and exciting new programming effectuated under his presidency.

Arthur Heydendael

Vice President

Arthur is a publisher of Print-on-Demand and e-Books. His job has him talk to loads of people from all over the world. He loves exchanging cultural marks with his customers. Aside from an eclectic interest in different cultures, Arthur is passionate about gospel piano music, windsurfing, sailing and tennis. He is very proud to be a longtime TNC Board Member.

Stefan van Doorne


Stefan is Partner at KPMG LLP working in the Audit practice within Technology, Media and Consumer Markets. He loves playing golf, running and traveling with his family. The first thing he does when he visits somewhere new is go up the tallest building in town for a proper view. He’s proud of all the exciting events that take place at TNC, with an extra shout out to our General Manager Hein-Jan for making this happen.


Nicolette Huisman

Board Member

Nicolette is an International Tax Advisor for Private Equity and Hedge Funds. She’s a total neat freak: tidying makes her unbelievably happy. There might only be one thing that makes her happier: traveling around the world. Nicolette is very proud of the fact that TNC stands out in New York by offering unique events with a Dutch touch.  

Karin Rathje-Posthuma

Board Member

Karin is an Exclusive Marketing & Sales specialist for luxury residential developments in NYC and a NY resident for 26 years. She loves art, design, architecture, ballet and Indonesian food. Karin is proud of the fact that TNC has a history going back over 100 years and is frequented by many generations of Dutch people. Even her family has a history with TNC. Her great aunt, who lived on Park Avenue as an au-pair, visited TNC to play bridge in the early days.

Yvonne Buysman

Board Member

Yvonne is a Sales & Marketing Executive in mobile technology. She is a big golf fan and a massive globetrotter. Buysman family fun fact: they founded the infamous Tulip Museum in Amsterdam where you learn about the ‘special and suspenseful history’ of Holland’s treasured flower. Yvonne is proud of TNC’s creative programming highlighting Dutch culture and the club’s dynamic network that keeps the Dutch connection strong in NYC.

Wouter Plantenga


Wouter Plantenga is Head of Group Client Services at JTC Group.