For over 25 years Jack has specialized in wealth tax matters for international private clients. He is widely published on these matters in the U.S. and abroad, presents at international and domestic conferences on various international private client matters, investment in U.S. real property, and acts as outside counsel and consultant for a number of U.S. and foreign trust companies on highly complex foreign trust matters. In 2004 Jack had an article published in Trusts & Estates professional journal, Foreign Trusts: The Capital Loss Debate. This article is still regarded in the professional community as the standard for U.S. tax treatment of net capital losses for U.S. beneficiaries of foreign non-grantor trusts.