International Tax Services | It’s What We Do
In 1983, we started as a typical CPA firm, doing tax, audit, and accounting. However, early on, there was a demand for tax support for international organization employees in the Washington, DC, area. These organizations, such as the World Bank and IMF, have a special status under the IRS tax code because they don’t fall under any one country’s jurisdiction. Supporting this population was our first foray into international tax. And very quickly, we shifted our focus to specializing in international and expat tax. For four decades now, we have been doing exactly that.
Today we thrive as an international tax firm—helping thousands of clients each year. And unlike most CPA firms in the United States, you won’t find us doing accounting, bookkeeping, or audit/attestation. We only work on international tax matters—it’s who we are and what every member of our team works on daily.
Our Promise to You
Providing excellent tax advice is one thing. But delivering it in a way that makes clients our biggest fans, that takes the experience to another level. What guides us? It’s the things we believe in passionately:
- Putting our clients’ interests first
- Taking responsibility for what needs to be done
- Being friendly, respectful, and patient
- Expanding our knowledge of international tax matters
- Providing best-in-class service worthy of referrals
About Our Tax Team
We’re proud to be multi-national with backgrounds and experiences as diverse as our clients. We’re also multi-generational, from recent college grads to grandparents. And we’re multi-lingual—speaking Spanish, Chinese, French, Korean, and others. If there is a specific language in which you would prefer to communicate with us, let us know, and we will try our best to accommodate your needs.
Our Leadership Team

The Wolf Group Partners: Bob Len, Len Wolf, Jen Marenberg, and Mishkin Santa
Len Wolf, CPA, Jen Marenberg, CPA and Mishkin Santa, JD, LLM, TEP are the leadership for The Wolf Group, PC. While Bob Len, CPA, serves as the Managing Director for The Wolf Group’s sister firm, Wolf Group Capital Advisors. Combined, this team has over 90 years of experience in international tax matters.
Refer with Confidence
Need a reliable tax partner for referring? We routinely work with attorneys, wealth managers, other CPAs, and foreign tax professionals who want to refer their clients to a CPA that specializes in international tax planning.
Contact us to talk with one of our directors.
Have a tax matter outside of the US? As a member of Nexia, we can work on tax matters around the world. Learn more.
Join The Wolf Group Team
We are always looking for highly talented professionals to join our team. Check out our available positions.
The Wolf Group’s History
Founded in 1983, The Wolf Group began its journey into international tax matters when it worked with in-house counsels at the IMF and the World Bank. This initial engagement involved tax issues for international organization employees and retirees.
In 1996, Wolf Group Capital Advisors was founded to provide wealth management services as a Registered Investment Advisory (RIA) firm, primarily for international organization employees and retirees. Today, Wolf Group Capital Advisors offers financial planning and investment services to a range of clients with cross-border needs, as well as those with only domestic interests. Learn more.
Providing Specialized International Tax Services Since 1983
Why The Wolf Group?
Since 1983, we’ve worked with clients in the United States and abroad on international tax matters. We have a long history of “cleaning up” complex tax returns, reporting foreign assets, and reconstructing financial records.
Check out our extensive team of CPAs, all with vast international tax experience.
Looking for a Nexia Partner?
We’re an active member of Nexia, a global network of independent accountancy, tax and business advisors with over 250 firms around the globe.
Meet Our Tax Professionals
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What our clients say
“The whole process was very efficiently handled with the minimum of fuss. Correspondence answered quickly and precisely. Overall, an excellent experience—we have recommended the Wolf Group to others.”
“Living overseas, your personal attention during tax time takes ALL the worry out of that one important task each year. I thank you kindly for giving me peace of mind while I live abroad.”
“Very courteous, timely, helpful service! A pleasure to do business with and we feel confident that the tax prep is done within our best interests and within the law.”