Managing properties in New York for over 30 years.

About Triad Management

Commercial & Rental Properties in Queens, Manhattan, and Brooklyn

Triad Management was founded more than thirty years ago as a family run company to manage rental properties in Long Island City, Queens. Since its founding, it has expanded to deliver management services to both commercial and residential properties in Manhattan, Brooklyn and Queens; providing the full range of asset management including rental, bookkeeping, regulatory agency filings and maintenance supervision. Its employees are knowledgeable about the regulatory environment to which many residential properties in New York are subjected, and about the structural and mechanical systems found in both commercial and residential properties.

Meet our Team

Administration and Management

Gerald Lederman (he/him), Principal

Jerry, born and raised in Sunnyside, has been a licensed real estate broker for over thirty years. He has extensive knowledge about New York City real estate management and its rent laws. He also has years of experience in the maintenance of structural and mechanical building systems.

Isabel Jimenez-Colon (she/her), Office Supervisor

Isabel, a longtime Sunnyside resident, has managed the Triad office for the past eighteen years. She has a BS in Accounting from Queens College and enjoys traveling in her free time.

 Maxxie Gutterman (they/them), Office Assistant

An NYC native, Maxxie is a new resident of Sunnyside. While studying for their real estate salesperson license, they are the maintenance manager, assist in office management, and maintain our website.

Rentals and Sales

Catherine Murphy (she/her), Leasing Broker

(914) 420-3495

A Queens native, Cathy currently lives in Sunnyside. Having worked in corporate administration before starting her real estate career, Cathy enjoys meeting people, helping them determine their ideal living arrangement, and realizing their real estate goals at the best price point for their particular situation. Licensed throughout New York State, Cathy primarily focuses on the Sunnyside and Astoria real estate markets.


Alberto Hernandez


Maintenance Technician

Edgardo Rosado


Maintenance Technician

Jorge Hernandez


Maintenance Technician

Simeon Aceituno



Let Triad Management take care of your property

Call us Today 718.729.7634