Long Island Real Estate Agents

Our team of Long Island Real Estate Agents uphold the guarantee that client service & satisfaction are the underpinnings of our business. Our associates foster a strong sense of trust and integrity with our clients. We are committed to providing the highest level of customer service to make your real estate transaction as smooth as possible.

To learn more about S&D Realty and its agents, please view our Company Profile

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Martin Schackner

Martin Schackner is a licensed Real Estate Broker and Certified Public Accountant with an M.B.A. from St. Johns University. He has over thirty (30) years experience in the commercial real estate industry. As Chief Financial Officer and Comptroller for a Regional Commercial Real Estate Operator he assisted with the financial aspects of numerous dispositions, work outs, and a vast array of creative financing solutions. Mr. Schackner is also Director of Real Estate Management for the Nassau County Landmark Properties and Mitchel Field Complex.

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Louis Santosus

Louis Santosus has been a New York State licensed Real Estate Salesperson for over twenty (20) years. Mr. Santosus specializes in the acquisition, disposition and leasing of all types of commercial property in western Nassau County. He is a past Trustee of the Village of Mineola and past Chief of the Mineola Fire Department. Mr. Santosus’ years in local government provide an expertise in zoning, planning and development issues.

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Gina Coletti

Gina Coletti is the Director of Marketing and Licensed Associate Broker at Smith & DeGroat Real Estate in Hauppauge & Mineola. Property Manager of the Nassau County Landmark Real Estate Portfolio and Mitchell Field Veteran Housing Complex, Ms. Coletti implements creative public-private partnerships, sells and leases residential and commercial properties and is a NY State Licensed Real Estate Appraiser. Prior to joining Smith & DeGroat Real Estate, Coletti had a successful 20-year career in corporate finance and sales with Citigroup’s Global Wealth Management and Retail Banking Divisions and an Executive Consultant with Rodan and Fields since 2011.

Ms. Coletti is the Co-Founder and Co-Chair of the Suffolk County Alliance of Chambers, Inc., Past President and Board Member of the Nesconset Chamber of Commerce. As President, Coletti coordinated improvement projects with Suffolk County Legislator John Kennedy, Smithtown Town Councilmen, Highway & Parks Department and the Suffolk County DPW to create the Nesconset Gazebo Park, Toner “Water” Park, and completed the Downtown Revitalization decorative street light project along Smithtown Boulevard. Her participation on the NS/LIJ Monter Cancer Center Executive Committee, Stony Brook Medicine Carol M. Baldwin Breast Cancer Research Committee, Vision Long Island panel and dedication to the Smithtown students includes years of participation on the Smithtown Industry Advisory Board, Female Power Brunch, Business Olympics and the P.T.A. In 2013, she co-founded the “Lax for M.E. and the G.A.L.S.” lacrosse event benefiting the Maurer Foundation for breast health education, the Girls Athletic League of Smithtown and mentored the Smithtown High School D.E.C.A. student volunteers on how to run a successful lacrosse tournament fundraiser. The resulting procedure manual won 2nd place in N.Y. State at the D.E.C.A. Finals. Her deep involvement in community service led Legislator Kennedy to appoint Coletti as the 12th Legislative Districts’ Representative to both the Suffolk County Lake Ronkonkoma Advisory Board and the Suffolk County Department of Economic Development & Planning Downtown Revitalization Citizens Advisory Panel.

In 2014, Coletti was nominated by Legislator Kennedy and honored by the Suffolk County Legislature as the “Suffolk County Woman of Distinction”, interviewed on the Cablevision T.V. show “Meet the Leaders” and appointed Commissioner of the 12th Legislative District as 1st Vice President of the Suffolk County Women’s Advisory Commission. Ms. Coletti and Legislator Leslie Kennedy created and Co-Chair a Women’s Empowerment Network Group. In May 2015, Long Island Business News recognized her as the Co-Founder/Co-Chair of the Suffolk County Alliance of Chambers, Inc. Her leadership efforts inspired Legislator Kennedy to nominate her as a Long Island Business News 2015 “Top 50 Most Influential Women in Business”. She earned a Bachelor of Science Degree in Business Administration and Finance from N.Y.I.T. Coletti and her husband, Robert are proud parents of their daughters Lauren, 16 and Jaclyn, 14.

Phone: 631.926.5385
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Marty Miller

Marty Miller is a licensed real estate Salesperson with 15 years of experience in many phases of commercial real estate. He is a graduate of the University of South Florida with a Bachelor’s Degree in Communications and Advertising. Mr. Miller was a member of the Greater Tampa Chamber of Commerce. He specializes in market and feasibility analyses associated with property procurement for shopping center development. He also specializes in lease negotiations, sales of shopping centers and out parcels, along with shopping center management and tenant representation. Mr. Miller was recently handling dispositions for a large supermarket chain. He is currently a member of the International Council of Shopping Centers.

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Nathan Schwartz

Nathan Schwartz is a licensed New York Real Estate Agent, Property Manager, as well as Head of Marketing and Web Development at Smith & DeGroat Real Estate. Nathan has previous experience in Sales and Telemarketing with a background in masonry and construction. Nathan is a graduate of the University of Hartford, Barney School of Business where he received a degree in Business Administration with an emphasis in Marketing. At the University of Hartford, he was a member of the American Marketing Association and held the position of finance chair. Nathan enjoys all sports and played Ice Hockey and Lacrosse during college. Nathan considers himself to be an avid golfer, where he can be found most weekends. Nathan is a member of many local Long Island Clubs including the Edward Smith Mineola Lions Club.

Phone: (860) 798 - 9550
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