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Meet the Board

Alexander Tsigutkin

Alexander Tsigutkin

President

Alex Tsigutkin came to the United States from Mariupol, Ukraine in 1980. Alex has spent more than 30 years on Wall Street as a fintech entrepreneur with education as a software engineer from both Yeshiva University and New York University. He is the founder of AxiomSL and served as its CEO from 1991 to the merger with Calypso in 2021.

Alex is currently a member of the Board of Directors of Adenza. He lives on the Upper East Side with his wife Diana and three children, Jeremy, Ruben and Matthew. Alex is passionate about Torah studies, Yiddishkeit and heavily involved in Jewish causes throughout the world.

Brian Kaufman

Vice President

Originally from Austin, Texas, Brian Kaufman is a Managing Director in the Real Estate Group at Blackstone. Before joining Blackstone in 2019, Brian was the Managing Partner of The Kaufman Companies, a privately held hospitality investment, development and asset management group in the U.S. and Europe. He previously worked at Highgate Capital Investment as a Senior Vice President of Acquisitions, at Goldman Sachs & Co in the Merchant Banking Division and began his career at Lehman Brothers in the Global Real Estate Group.

Brian received a BS from Cornell University and currently serves on Dean’s Advisory Board at the Cornell Nolan School, SC Johnson College of Business as well as the Advisory Board of the Nolan Center for Real Estate and Finance. He has been recognized for his social impact and philanthropic efforts and, in 2022, received the Peter G. Peterson Award, named after one of Blackstone’s co-founders. Brian is a member of The Council on Foreign Relations.

Brian Kaufman
Boris Tiomkin

Boris Tiomkin

treasurer

Boris grew up in Moscow before he immigrated to Israel in 1975. In 1978 he graduated from Technion and served in the Israel Defense Forces from 1978 to 1981. From there he worked for investment banks moving from Johannesburg, South Africa to his final destination of New York City in 1987. In 2001 he founded the hedge fund administration company AIS Fund Administration, which was acquired by US Bank Corp in 2012. Boris happily retired in 2014 and has remained a private investor.

He is currently a proud member of the board of United Hatzalah of Israel and active in various Jewish charities. He resides in the Upper East Side with his wife Tanya with whom he has 2 children and 6 grandchildren and his many interests include classical music, theater, traveling, golf and of course, fly fishing.

treasurer@thealtneu.org

Kenneth S. Aschendorf

Kenneth Aschendorf Co-founded APF Properties in 1995. From its first purchase, a single building on 11th Avenue with $750,000 in equity, APF Properties has grown into an established private equity real estate investment firm based in New York with a portfolio of office buildings totaling almost 2.0 million square feet as well as residential investment holdings. Kenneth received a BS from NYU College of Business and a BS in Electrical Engineering from NY Institute of Technology.

Kenneth and his wife raised their children in a home where Israel and Jewish life played a key role. He is involved with numerous Jewish educational and outreach organizations both here in the US and in Israel. Kenneth has served as a Charter Trustee at the Ramaz School in NY, a Trustee at Congregation Kehilath Jeshurun in NY, and has been a strong supporter of AltNeu Synagogue. Kenneth lives in Manhattan with his wife, Wilma. They have three children, two of whom are married and three grandchildren.

Brad Colman

Brad lives on the Upper East Side with his wife, Maeva.

They have three children, Noa (10), Joshua (7) and Asher (1). Brad has spent the last 17 years since graduating from NYU working in investment banking and private credit.

He is currently a Senior Managing Director and the Head of Healthcare at Blackstone Credit, where he focuses on originating, analyzing, executing and monitoring credit investments.

Brad Colman
Oriel Eisenberg

Oriel Eisenberg

Ori Eisenberg is the President of Barzell Global, an investor and financier. Married to Tamara Morsel, a Professor of Jewish History at NYU he is a father to 3 wonderful boys: Yechiel, Emmanuel and Shai. After learning in the Chevron Yeshiva in Jerusalem, Ori graduated from MIT in 2013. He is a prominent player in developing US real estate alternative financing instruments and has been overseeing over $2B in transactions to date. Ori’s focus is on finding creative and tailor-made solutions for large corporations. He serves as Chairman of JBH Avratech – the largest Israeli non-profit organization focused on vocational training and integration of Haredi men into tech employment.

Gideon Etra

Raised on the Upper East Side, Gideon Etra is a principal at Excelsior Investors, a real estate partnership which invests in prime industrial parcels across the New York City market. 

He is a long-time supporter and leader of Jewish communal and pro-Israel organizations. He is currently a board member of UJA-Federation of New York’s Real Estate Council.  Previously, he served as co-chair of CAMERA’s Young Leadership Board and as a member of MJE’s Downtown Advisory Board.

Gideon received a B.A. in History from Yale University.

Estee Friedman-Stefansky

Estee Friedman-Stefansky

Estee Friedman-Stefansky is the principal of general studies at Manhattan High School for Girls, where she has been teaching and leading since 2003. She teaches Modern Literature and Social Psychology to the juniors and seniors. Estee holds a B.A. in English from Lander College, M.A. in English from Brooklyn College, and is currently pursuing her doctorate in educational leadership with a focus on social justice from Fordham University.

Estee and her husband David, an investment banker, live on the Upper East Side with their four children, Ariella, Uri, Elianna and Lola.

Aaron Stern

Aaron Stern is a Managing Partner and the Chief Investment Officer of Converium Capital, a multi-strategy opportunistic investment manager with offices in Montreal and New York. Prior to founding the firm, Aaron was a Partner and Managing Director at Fir Tree Partners. Prior to Fir Tree, Aaron held investment roles at O.S.S. Capital Management and Millennium Management and began his career as an investment banking analyst in Credit Suisse’s Leveraged Finance and Restructuring groups. He earned his bachelor’s degree in Commerce, with a Major in Accounting from McGill University, where he is a Global Expert and guest lecturer. Outside of the office, Aaron and his wife Sharon dedicate their time to their two boys Max and Adam and to Jewish, educational and pediatric health causes in Montreal and New York.

Aaron Stern