The Emerald Team

Isaac Kassirer


Isaac’s real estate career began in 2006 with the management of an 800-unit portfolio in the Bronx. His hands-on involvement in every facet of real estate management honed Isaac’s keen eye for identifying value-add opportunities and his overall expertise in the trends of New York City’s real estate market.

When founding Emerald Equity Group in 2012, Isaac brought to the new company a rare combination of astute real estate savvy, seasoned management expertise and sound business acumen. This synthesis of strengths has been cited repeatedly in the media as the driving force behind Emerald’s high-profile residential acquisitions.

Isaac is the principal of Emerald Equity Group and serves as its CEO. He oversees and directs all aspects of Emerald’s activities, policies and processes relating to asset management, including its acquisition and investment strategies.

Gary Kassirer


Gary’s real estate career began in the mortgage brokerage field. Starting out as a broker at Meridian Capital, Gary negotiated hundreds of millions of dollars in real estate financing, in both commercial and residential deals. Gary’s expertise in real estate finance has brought to Emerald a unique strength in sourcing, negotiating, and securing the requisite capital for funding Emerald’s acquisitions. Since joining Emerald, Gary has sourced, negotiated, and closed over $1 billion in real estate transactions.

With a thorough understanding of the nuances in real estate investment and financial risk management, Gary puts the full weight of his seasoned projection expertise into every deal negotiated and managed by Emerald.

As the company’s Executive Vice President, Gary oversees all aspects of acquisitions, refinancing and disposition of Emerald’s portfolio, as well as asset management and investor relations. Gary is also charged with recruiting investors, securing the capital, and maintaining the relationship beyond the acquisition.

Azriel Ostrow, CPA


As Chief Financial Officer for both Emerald Equity Group and its subsidiary, ArchRock, LLC Azriel’s extensive experience in internal control, financial analysis and reporting for both private and publicly traded companies, is key to the company’s management of finances, reporting and controls.

Azriel’s expertise is a vital asset earning Emerald the strong confidence of some of the most prestigious lenders, who have come to rely on its thorough cost analyses and financial documentation.

Prior to joining Emerald, Azriel served as an Audit & Advisory Professional at Deloitte & Touche, LLP where he successfully led audit teams on both large public and privately held corporations. In addition to audits, Azriel has assisted on multiple advisory projects including implementation of new internal controls as well as assisting clients in the completion of complex transactions.

Yitzie Pretter


Yitzie Pretter serves as Chief Operating Officer for Emerald Equity Group LLC. Yitzie comes with over a decade of NYC real estate experience. Yitzie started his career by managing a 1,000 unit portfolio in NYC, and has served in various management capacities over the years, most recently as Vice President of Acquisitions and Operations for Quantum Equities in Brooklyn.

Yitzie is responsible for overseeing all of Emeralds operations and is responsible for overseeing Emeralds subsidiary management company ArchRock LLC.

Yitzie is a graduate of Touro College with a degree in business management and marketing.