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Mark T Donnelly

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Residential Real Estate

Mark T Donnelly

Mark T. Donnelly, a Licensed Associate Broker, is a distinguished real estate professional with a client-first approach and a deep passion for the industry. Since obtaining his license in 2009, Mark has earned an exceptional reputation for combining his formal education, advanced marketing strategies, and outstanding customer service to ensure that every client's buying or selling experience is as... Read More

Mark T. Donnelly, a Licensed Associate Broker, is a distinguished real estate professional with a client-first approach and a deep passion for the industry. Since obtaining his license in 2009, Mark has earned an exceptional reputation for combining his formal education, advanced marketing strategies, and outstanding customer service to ensure that every client's buying or selling experience is as fulfilling as the outcome.
Mark's career achievements are a testament to his dedication. In 2025, he will serve as President of the Long Island Board of REALTORS® (LIBOR), where he has been an influential leader for years. A founding member and past president of LIBOR’s Young Professionals Network (YPN), Mark has also served as LIBOR president-elect, a director since 2015, and an active contributor to committees at the local, state, and national levels. His efforts have earned him accolades such as the LIBOR REALTOR® Salesperson of the Year in 2019 and recognition as an Elite Top Producer by Howard Hanna | Coach Realtors.
 
As the leader of TEAM MAE, Mark collaborates with his wife, Amy Donnelly, sister-in-law, Emily Catik, and mother, Susan Catik. Together, they embody the motto "Real Estate is our Passion," delivering exceptional service to their clients. Additionally, Mark is the Career Advancement Coach at Howard Hanna | Coach Realtors, where he mentors new and experienced agents, helping them grow their businesses and navigate the professional transition process.
 
Mark’s passion for real estate extends to fostering professional development. He holds several advanced designations, including CRS, ABR, SRES, and GRI, highlighting his commitment to continuous learning and elevating industry standards. His involvement with prestigious networks such as Leading Real Estate Companies of the World and Luxury Portfolio International ensures that his clients benefit from a global reach and unparalleled resources.
 
Beyond real estate, Mark co-founded Long Island Cheer, Long Island’s largest cheerleading training facility, which has received national and international recognition since its inception in 2006. A devoted father of two, Mark values quality time with his family and strives to balance his personal and professional commitments.

Mark’s enthusiasm for real estate is contagious. As he puts it, "Real estate is my passion!" Whether you’re looking to buy, sell, explore the market, or consider a career in real estate, Mark’s expertise, dedication, and infectious energy make him the ideal partner for your journey. Contact Mark today to experience a level of service that exceeds expectations.

Achievements/Recognition:

  • LIBOR President
  • NYSAR Director
  • Licensed Associate Broker
  • NAR Research Committee Member, Chairperson for 2022
  • Coach Realtors Career Advancement Coach
  • 2023, 2021-2010 Coach Realtors Office Elite-Top Producer
  • 2019 Long Island Board of Realtors Salesperson of the Year
  • Coach Realtors Gold Level Achievement
  • Coach Realtors Silver Level Achievement
  • Coach Realtors Bronze Level Achievement
  • GRI Designation-Graduate Realtor Institute
  • SRES Designation- Senior Real Estate Specialist
  • PSA Certification- Pricing Strategy Advisor 
  • RENE-Real Estate Negotiating Expert
  • SRS-Seller Representative Specialist
  • AHWD-At Home With Diversity
  • C2EX-Commitment to Excellence, National Association of REALTORS®
  • E-Pro Designation
  • CHMS-Certified Home Marketing Specialist/Stager
  • CBR-Certified Buyer Representative
  • MRP Certification-Military Relocation Professional
  • SFR-Short Sale & Foreclosure Resource Certification
  • CNE-Certified Negotiation Expert
  • REAL-REALTORS® Excelling in Association Leadership
  • LIBOR YPN Past President
  • Coach Realtors Relocation Specialist

 

Client Testimonials

"Mark, Amy and Emily were outstanding! Mark handled every aspect of getting the house ready for sale, at a great price and resolved any issues immediately that came up along the way. Mark found o... read more"
Virginia P.
"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 schedu... read more"
Mario C.
"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... read more"
Angela G.
"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 ac... read more"
Gary & Marie
"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 ... read more"
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... read more"
Janis H.
"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 cari... read more"
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
"Mark was patient and attentive, finding properties that fit our needs. He was helpful, accommodating and fun to work with. We highly recommend."
LindyMom

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FEATURED LISTING 22 HAWTHORNE STREET | MOUNT SINAI $689,000 | 3 Beds | 2 Baths | 1,582 sqft
Welcome home to this beautiful Mt. Sinai ranch! This home features an open layout with three bedrooms, updated kitchen with dining area, large living and family rooms, and hardwood floors! The sizable...
  • 3 Beds
  • 2 Baths
  • 1,582 sqft
  • 0.35 ac
  • 1973 Built
  • 985917 MLS#
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FEATURED LISTING 33 N WASHINGTON AVENUE | CENTEREACH $549,000
Investment opportunity! Possible to subdivide! Home features a one bedroom unit with living room, kitchen and full bath & a two bedroom unit on two levels with living room, kitchen, sitting room and f...
  • 1.00 ac
  • 1930 Built
  • L3583625 MLS#
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FEATURED LISTING 153 COCOANUT STREET | BRENTWOOD $650,000 | 4 Beds | 2 Baths | 1,641 sqft
Lovely HI-Ranch near all. Large property . Possible M/D with proper permits.
  • 4 Beds
  • 2 Baths
  • 1,641 sqft
  • 0.25 ac
  • 1964 Built
  • 881529 MLS#
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FEATURED LISTING 10 HUNTER AVENUE | MILLER PLACE $715,000 | 4 Beds | 2 Baths | 2,500 sqft
Situated on a quiet block, this unique property is residential with a professional office that has been used as dental. With an attached apartment featuring 2+ bedrooms for added convenience, the prop...
  • 4 Beds
  • 2 Baths
  • 2,500 sqft
  • 0.52 ac
  • 1974 Built
  • 890964 MLS#
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FEATURED LISTING 25 WILSON STREET | CENTEREACH $679,000 | 4 Beds | 2 Baths | 1,900 sqft
Welcome to 25 Wilson Street, Centereach in the heart of sought after Holiday Park. This updated colonial offers 4 bedrooms and 2 full baths. Step inside to your living room with vaulted ceilings and ...
  • 4 Beds
  • 2 Baths
  • 1,900 sqft
  • 0.21 ac
  • 1966 Built
  • 960674 MLS#
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FEATURED LISTING 9 HINTON AVENUE | NORTH BABYLON $719,999 | 3 Beds | 2 Baths | 1,500 sqft
Welcome to this perfect mid-block Sprawling Exp. Ranch on quiet street in beautiful Babylon. 3 Br, with a bonus room, 2 Updated Baths. Completely renovated in 2022. New Roof, New siding, trim & gutte...
  • 3 Beds
  • 2 Baths
  • 1,500 sqft
  • 0.19 ac
  • 1971 Built
  • 966531 MLS#
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