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Any business that operates internationally requires more than just a local service provider for the establishment and management of their foreign operations. Since the early 1980s, InterGest has steadily expanded internationally. We now have 45 InterGest partners and operate in over 50 countries, offering clients the same level of professional service and support worldwide. InterGest partners are not only specialists in establishing, developing and managing business entities; they also assist clients with intercultural issues and provide comprehensive advice in all key areas of business.

InterGest USA


InterGest North America LLC

Director: Wilfried Roggenbau
400 Oser Avenue, Suite 1650
Hauppauge, NY 11788


InterGest N. America Los Angeles

Director: Wilfried Roggenbau
1720 Ardmore Avenue, Suite 117
Hermosa Beach, CA 90254

16052 Beach Blvd., Suite 221
Huntington Beach, CA 92647


InterGest N. America Texas

Director: Wilfried Roggenbau
2676 Reunion Blvd.
Austin, TX 78737


Phone +1 631 501 0500
Fax +1 631 501 1060

Country Flyer InterGest USA.pdf (0.95 MB)

About InterGest North America
InterGest North America was formed in 1997 to assist foreign companies in establishing and developing their North America business activities in the USA. The benefit is that they receive a flexible administration solution including financial, legal and fiscal consulting and bookkeeping for all countries from a single source. InterGest North America provides these business administration services with local knowledge in English and German, and also through long and well established contacts.


Wilfried Roggenbau has a Master of Business Administration degree with a concentration on international trade and finance from the University of Duisburg. He has over 20 years of experience for both German and American multinational corporations, including Thyssen, Rheinbraun and Citgo Petroleum. Wilfried Roggenbau worked as Financial Director in New York until 1997.


Kerstin Roggenbau
earned a Bachelor of Arts Degree in Economics from the University of Massachusetts in Amherst. After working for several months for a mid-size company in Germany, she gained extensive experience in the US retail business. Since 2004 she has been employed by InterGest North America. She opened the InterGest office in California in May 2009.


Where is InterGest North America
InterGest North America has its office in Hauppauge, Long Island, the biggest industrial pard east of the Mississippi. It is just a short drive from the centre of Manhattan’s theatre district and shopping centers as well as New York’s major airports J.F. Kennedy and la Guardia. The Los Angeles office is situated just a few miles from LAX International Airport and is situated in Hermosa Beach facing the Pacific Ocean not far away from the beaches of Santa Monica and Malibu.


Ulrike Anterist

International Coordination

Tel. +49 681 59 18 78 12

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