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Mark T Donnelly

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Mark Donnelly

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West Islip
463 Montauk Highway
West Islip, NY 11795

Phone #: (631) 587-1700
Mobile #: (631)872-7553

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Agent Designations:
Lic. RE Salesperson

My Profile

As a professional in the business of real estate, Mark T. Donnelly strives to use his background in customer service oriented fields to serve the public to the best of his ability with the understanding that the experience is just as important as the end product. In addition, Mark makes use of his schooling in marketing to brand himself and his business to portray the unmatched quality of service that he prides himself on. Mark's education in foreign culture and experiences of studying abroad have given him insight on the importance of understanding and respecting the individual, which is essential in dealing with someone purchasing or selling a home.

With the motto "Real Estate is My Passion", Mark strives to wholeheartedly dedicate himself to his clients, past and present!


  • Coach Realtors Career Coach
  • GRI Designation-Graduate Realtor Insitute
  • SRS-Seller Representative Specialist
  • E-Pro Designation
  • CHMS-Certified Home Marketing Specialist/Stager
  • CBR-Certified Buyer Representative
  • SFR-Short Sale & Foreclosure Resource Certification
  • CNE-Certified Negotiation Expert
  • LSE-Leading Real Estate Companies of the World Leading Service Expert
  • LSS-Leading Real Estate Companies of the World Leading Sales Specialist
  • LCL-Leading Real Estate Companies of the World Leading Certified Leader
  • LRS-Leading Real Estate Companies of the World Leading Relocation Specialist
  • 2017 & 2018 NYSAR Director
  • 2017 YPN Past President/Director, 2015-2017 YPN President, 2014 VP/President-Elect, 2013 VP/Treasurer, 2012 Treasurer, 2011 Treasurer
  • 2015-2018 LIBOR Director
  • 2018 NAR Research Committee
  • Coach Realtors Office Top Producer-Office Elite 2016 & 2017
  • Coach Realtors Salespersons of the Year 2015 (with Amy Donnelly)
  • Coach Realtors Referral Agents of the Year 2015 Coach Title
  • Coach Realtors Platinum Level Achievement 2015
  • Coach Realtors Salespersons of the Year 2014 (with Amy Donnelly)
  • Coach Realtors Salespersons of the Year 2013 (with Amy Donnelly)
  • Coach Realtors Gold Level Achievement 2013
  • Coach Title Referral Agents of the Year 2013 (with Amy Donnelly)
  • Coach Realtors Salesperson of the Year 2012 West Islip
  • Coach Realtors Client Service Award Nominee 2012
  • Coach Realtors Relocation Specialist
  • Long Island Board of Realtors YPN "Top 20 Under 40 Rising Stars" Winner, 2012
  • Coach Realtors Winner's Circle Inductee, 2011
  • Coach Realtors Client Service Award Nominee 2011
  • Coach Realtors Selling Agent of the Year 2010 Babylon
  • Wells Fargo Residential Home Mortgage Referring Agent of the Year 2010 Babylon
  • Coach Realtors Client Service Award Nominee 2010
  • Coach Realtors Silver Level Achievement 2010
  • Coach Realtors Outstanding Achievement Award for 2009
  • Coach Realtors "Rookie of the Year" 2009
  • Coach Realtors Client Service Award Nominee 2009
  • Member of RPAC, Education Committee, Risk Reduction Committee, Strategic Planning Task Force
  • Stony Brook University Class of 2005: BA Economics, Business Marketing & Italian Studies- Summa Cum Laude
  • Golden Key Honor Society
  • Phi Beta Kappa Honor Society
  • Coca Cola Scholar, Class of 2002
  • Centereach High School Class of 2002: Valedictorian



"In the last year and a half Mark has helped my family purchase two homes. The first being one for my parents, and the second being my own.
Both my parents work full time and have odd schedules, and Mark was available for them 24x7 to answer questions, show homes at odd hours, and eventually work his magic by getting their offer accepted on their new home. The same was the case when I finally decided to purchase my first home a few months later. Mark is a true professional and will do all he can to get the deal done. My family highly recommends him!" -Mario C., Bethpage & Babylon

"I would absolutely recommend Mark Donnelly for his aptitude of this ever changing real-estate market, as well as his comprehensive follow-ups and attention to details. Marks’s endless energy and drive to facilitate our real-estate needs makes him a star in this business." -Angela G., Blue Point

"Mark made the selling of our home a painless experience in his professional, organized, knowledgeable manner. His suggestions for making it more marketable were brilliant; and he always acted in our best interest, both in the sale of our home and the consequent purchase of a condo. We were very glad to have chosen him as our realtor." -Gary & Marie, Babylon to Manorville

"Sometimes in life, you get the opportunity to work with someone who stands out in front of the crowd. Mark is one such person. His expertise in real estate, combined with enthusiasm and the care that he shows his clients, is extra special. I am privileged to get to partner with Mark.”-Alan K., Mortgage Specialist

"Dear Mark, I met many real estate agents while in my search of a new home, but it seemed the more I met, the more I realized I could not do this by myself! Everyone else was out to help the seller and in turn himself, but who was looking out for me? When I met you, your sincerity and honesty was refreshing! You not only helped me find my new home, but you guided me through the whole overwhleming process! I greatly appreciate all of your help and will surely recommend you to anyone I hear who is looking to buy or sell! THANK YOU!!! "-Janis H., West Islip
"His expertise and advice on selling our home was fabulous! He takes pride in doing what is in the best interest of his client and is quite knowlegable about the real estate market. He is a very caring and a very professional agent. We would highly recommend him!" -Bill & Denise W., Relocation Seller Clients
"Dear Mark, Thank you so much for all of your help in finding me my new home! Your help walking me through the process is much appreciated! Thank you also for your generous house warming gifts!"-Kristen, Islip
“Mark is a hard working Realtor who shows sincere dedication to his customers and clients.”-Bob L., Owner Coach Title
His expertise and advice on renting my home was incredible! He takes pride in doing what is in the best interest of his client and is quite knowlegable about the real estate market. He is a very caring and a very professional agent. I would highly recommend him!" -Sean S., Relocation Client
“Mark is a detail-oriented Agent who gets the job done with strict attention to the needs of his customers and clients. His energy, enthusiasm and experience have set him apart in his market area.” -Joanne S., Coach Realtors Manager
"Thanks so much Mark!!!! You have been more than helpful and it is greatly appreciated!"
-Greg, Farmingdale
"I wanna say a few things- A) I think you're a great agent and I appreciate everything you do/have done for us B) this really is a monumental decision. a lot has to be taken into consideration. a lot of stress and emotions!!! But, YOU MAKE THIS EASY!!!! thanks for everything. "-Dan and Cait V., Hauppauge