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International Success

One & Only Holding is a multifamily Office dedicated to making your dreams a reality. For more than two decades we have helped a select group of clients and their families by providing services unlike any other. Through coordination with our international strategic alliances, we have helped and served more than 100 high-net-worth families prosper through building managing and preserving their wealth.



Gennady Perepada

Investment Consultant

Gennady Perepada Is a highly sought-after real estate broker based in New York City. Born in Ukraine, Mr. Perepada immigrated to the United States in 1990 and has been conducting business in the United States for over twenty years. He is the co-founder and President of One and Only Realty, Inc., a real estate brokerage firm headquartered in New York City.

Gennady’s career has been one not shy of excellence, as he has been involved with a significant number of high profile real estate transactions, emanating from all over the globe. His understanding of foreign clients and their needs makes him the perfect fit in assisting his multinational clientele.

Aiya Tulemagabetova

Investment Consultant

Ms. Tulemaganbetova is the President of Alfa Consulting Group Inc. She is a business, executive management, and marketing expert with over 25-years of experience in a variety of industries through which she has built a strong high-profile network, particularly in Europe and Central Asia.

Prior to investing into her own firm in the United States, Ms. Aiya is managing partner at Rian Consult LLC in Kazakhstan. Aiya is a dedicated advocate for women rights and gender politics.

Aiya has received her law degree from Moscow Institute for international Relations in Moscow, Russia. She also holds an MBA degree in economics and management from Business Academy in Kazakhstan.

Edward Mermelstein

Investment Attorney

Edward A. Mermelstein is an attorney, legal strategist, businessman, and philanthropist. Edward is especially skilled in international corporate and real estate law, private equity investment and joint ventures, real estate investment, management and development as well as claims and dispute resolution. He is also the founder and CEO of One and Only Realty, Inc.

Edward has been named one of the 10 most influential figures in New York City real estate. Often quoted in the New York Times, Bloomberg, the Wall Street Journal, and The Real Deal, Edward is regarded as a leading expert when it comes to closing complex deals and winning unique legal cases. Edward has also been featured on numerous talk shows, such as Fox News, CNBC, Reuters, BBC, and Bloomberg.

Get In Touch

Alfa consulting group LLC.
18 E. 48th Street, Suite 702
New York, NY 10017

Fax: +1 (212) 268-1556

Office: +1 (212) 268-1555

Cell (USA): +1 (917) 565-4632


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