About Us

Introduction
When it comes to buying, selling, or leasing your Florida home or vacation property, you have numerous options. However, if you seek a seasoned Realtor with an exceptional reputation for representing buyers and swiftly selling and leasing condominiums, homes, and vacation properties at favorable prices on Singer Island and surrounding areas, look no further. Our track record, esteemed reputation, and innovative marketing techniques distinguish us as your ultimate choice for real estate services.
Dermot OBrien joined Sotheby’s International Realty in 2019, bringing with him 35 years of business experience, including a successful decade running his own brokerage, Dermot OBrien Realty, on Singer Island. He offers extensive knowledge to clients interested in buying, selling, or leasing real estate on Singer Island, Juno Beach, Palm Beach Gardens, Jupiter, and the island of Palm Beach.
Since 2004, Dermot has achieved over $300 million in sales on Singer Island and nearby areas, earning recognition from several prominent publications and numerous awards, such as the 2012 Ritz Carlton Residences Power Broker Award, the 2013-14 International Property Magazine Best Real Estate Agent Florida Award, and the 2017-2018 Best Boutique Real Estate Brokerage Florida Award by the same publication. He was also named one of the 2022 Real Trends America’s Best Real Estate Professionals and one of the top 250 Palm Beach County Real Producers in 2024. Dermot holds an MBA from the Kellogg Graduate School of Management at Northwestern University and an honors BA from University College Dublin in Ireland, as well as diplomas from the British Institute of Marketing and the Irish Digital Marketing Institute.
A native of Ireland, Dermot began his business career in London with a leading advertising agency and later in new product development. After completing his MBA at Northwestern University, he continued his successful career in marketing and management consulting before launching an Internet business in 1997. With experience at both large companies like Unilever USA in Greenwich, Connecticut, and Collett Dickenson Pearce Advertising in London, Dermot has gained a diverse business background.
Dermot started his real estate career in East Hampton, New York, before moving to Florida in 2003, where he focused on the exclusive enclave of Singer Island. Working on-site for a condominium developer, he successfully sold 40 multi-million dollar properties, earning a prestigious project award. He continued to deepen his market knowledge and successfully assisted clients in selling their properties during a challenging market, earning top producer awards in 2008, 2009, and 2010.
In 2010, Dermot founded Islands Realty, later renamed Dermot OBrien Realty, with an office in the Palm Beach Marriott Singer Island Hotel & Resort. His dedication to concierge-style service, innovative marketing, and cutting-edge technology helped establish his boutique agency as a premier choice in the area. With over 20 years of experience in real estate sales, Dermot’s tenacity and client rapport have made him a respected Realtor. He has sold nearly 300 properties and represented landlords and tenants in over 150 transactions. His deep knowledge of the condominium buildings and single-family home neighborhoods on Singer Island and surrounding areas enables him to provide exceptional service to his clients.
“I love what I do. I love the challenges. I truly enjoy meeting new people and hearing their stories. The opportunities I’ve had in America have been amazing, largely due to the incredible people I’ve met and worked with.”

