Our Agency History

GRBM Insurance is a second generation, family owned and operated independent insurance agency located in Brewster, NY, 75 miles north of New York City.


Established in 1986, GRBM has a wide customer base. We service clients from New York City, Long Island, Westchester County and up the Hudson Valley. Additionally, we service many clients from Litchfield, Fairfield and New Haven County. We are licensed to sell insurance in New York, New Jersey, and Connecticut.

Our knowledgeable staff has over 70 years combined experience in the insurance field. Our agency Founder, Gary J McCarthy, holds a CIC (Certified Insurance Counselor) designation. The Society of CIC’s holds their members to the highest standards of professionalism to give you the assurance that you will receive the best insurance advice. Our customer service staff will offer you the courtesy and respect you deserve as a valued client.

Our goal as your insurance agency is to provide you our knowledge and expertise to help you make the best choices to protect what is important to you. Navigating through the broad range of insurance products is challenging. Let GRBM Insurance be your guide to making informed, responsible decisions.

Meet The



Gary McCarthy, Sr.

Gary McCarthy, Sr.


Gary Sr. founded GRBM after working in the insurance industry for a number of years. With over 30 years of experience Gary is the senior leader and adviser on all matters of the agency. Gary works tirelessly for his clients and built GRBM from nothing to the thriving agency we are today.

Gary R McCarthy

Gary R McCarthy


Gary joined the agency back in 2011 and began learning the ins and outs from his father. He has focused on commercial insurance but enjoys a wide variety of insurance types. We like to take the mystery out of insurance and educate our clients and potential clients of their coverage options.

Geoff McCarthy

Geoff McCarthy


Geoff joined the agency in 2015 after earning his degree in Risk Management from State University of New York at Oswego.

Timely Support

GRBM delivers timely service to each of our valued clients.

Creative Ideas

GRBM brings together experience and youth, to present creative and comprehensive solutions to our clients.

Advanced Technology

Cutting edge technology is used to better serve our clients.

Clear Communication

If you have questions, we work to clearly communicate the answers to all your insurance related questions.

© GRBM - All Rights Reserved  | With ♡  in New York

For Immediate Help Call 646.381.1977

Agents Available 24/7

We will be in contact with you as soon as possible.