“Our Story”

Solutions 4 Expats BV was established in April 2004 to provide high-quality US tax services for US citizens living and working outside the US as well as foreign nationals living and working within the US.

Since then our vision has continued to expand in pace with the unique needs of our international clients and the dynamic financial environments in which they live. With a generous knowledge of the special concerns and challenges facing US citizens living abroad as well as foreign nationals within the US, we are positioned to offer detailed, expert services and support ranging from basic US tax returns to more complex relationships.

Our Team

Constanze Woelfle

Founder and Owner

A licensed CPA with over 20 years of experience, Constanze specializes in US International taxation and maintains the most up to date knowledge in the areas of US individual and estate tax planning as well as worldwide tax strategies. She speaks English and Dutch fluently and has a good understanding of German and French. Constanze is originally from the San Francisco Bay Area, California. She started her career with PriceWaterhouseCoopers (PwC) in January 1995. She developed her professional knowledge at PwC while working in the Palo Alto, Frankfurt, and Amsterdam offices, culminating in the position of US Tax Manager in charge of the US International Assignment Solutions Team.

Colleen Pang

Senior Tax Consultant

Colleen Pang has been a part of our team since January 2012. She is an Enrolled Agent and has gained her experience with specialized US tax issues while working in our team over the last 5 years. Before becoming a U.S. Senior Tax Consultant, she had a career in providing market research data, assisting companies in making better marketing decisions, providing insight into their customers through the design, execution, and interpretation of market research studies. Her clients came from a wide range of industries, with projects covering North America, Latin America, Europe and Asia. Colleen first came to the Netherlands on a Rotary scholarship which funded a year of study at Nyenrode University where she earned an International MBA. She also holds a BA in broadcast journalism from USC Annenberg School for Communication and Journalism and an MBA from Northwestern University’s Kellogg School of Management. Colleen hails from Kailua, Hawaii.

Diana Scott-Smith

Office Manager

With years of experience in client relations and operational management, Diana offers primary support to both Solutions 4 Expats clients and our team. Diana will often be your email contact as well as the voice you hear on the phone, providing you with assistance and helping you through the process of document gathering at the start of tax season and throughout the year. Diana is originally from Northern California and has a degree in Anthropology as well as professional training as coach and counselor. Diana is fluent in Dutch and English.



Stichts End 73A
1244 PL Ankeveen
the Netherlands

KVK 34204237

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