Our Team


Mark Nestler


Mark Nestler is a well-known and established agent in the luxury real estate arena, celebrated for his commitment to providing unparalleled expertise and a deeply personalized approach to buyers &  sellers seeking luxurious homes and condominiums in Southeast Florida. With a career spanning over 40 years, Mark's professional focus revolves around specializing in luxury homes, country clubs, oceanfront properties, and investment real estate, catering to the most discerning clientele.

As a licensed real estate broker in Floridan and Colorado, Mark brought his expertise to ski areas and vacation properties, showcasing his versatile skill set and commitment to delivering exceptional service across multiple markets. Formerly a Co-owner of Nestler Poletto Sotheby’s International Realty and presently a member of Nestler Poletto at One Sotheby’s International Realty, Mark's influence resonates locally, nationally, and internationally through the robust networks of Sotheby’s and One Sotheby’s International Realty.

Mark's portfolio boasts more than $6.8 billion in personal residential real estate brokered and corporately managed sales, a testament to his unwavering dedication and expertise in the industry. His leadership was also evidenced through his former chairmanship of the Professional Standards Committee for the Association of Realtors, emphasizing his commitment to maintaining the highest ethical standards in real estate practices.

Originally hailing from Yonkers, New York, Mark has been a Florida resident since 1969. He is a proud graduate of the University of Miami in Miami, Florida, and has been a dedicated resident and club member of St Andrews Country Club since 1988. Mark's personal life is enriched by his long-standing marriage to Sheila Nestler since 1975 and his daughters, Jennifer, a scientist in Fort Collins, Colorado, and Michelle, a resource teacher and administrator for preschool autistic children in Palm Beach County Schools.

Mark Nestler epitomizes the embodiment of expertise, dedication, and a personalized touch in the luxury real estate sphere, making him a trusted advisor for those seeking the finest properties in Southeast Florida.


John Poletto


John Poletto is a distinguished figure in the realm of luxury residential real estate, renowned for his unparalleled representation of Southeast Florida's most exquisite properties. With a career spanning over 40 years, John's professional objective has been to artfully unite extraordinary estates with discerning buyers seeking the pinnacle of luxury living.

As the former co-owner and Broker of Nestler Poletto Sotheby's International Realty and a current member of Nestler Poletto at One Sotheby’s International Realty, John's influence extends locally, nationally, and internationally through the robust networks of Sotheby’s and One Sotheby’s International Realty. His expertise has facilitated more than $6.8 billion in personal residential real estate brokered and corporately managed sales, a testament to his unparalleled skills and commitment to excellence.
What sets John apart is not just his intimate knowledge of properties, but his deep understanding of his clients' needs. He masterfully intertwines these elements, showcasing an innate talent for matching extraordinary properties with lives that appreciate their uniqueness.

A proud resident of Florida since 1978, John hails from Allen Park, Michigan. He is a graduate of George Washington University in Washington, D.C. John's commitment to his community is evident through his 30+ year residency and club membership at St. Andrews Country Club in Boca Raton. Alongside his wife, Sallie, and daughters Natalie and Ashley, John is an active 35+ year member of the Spanish River Church in Boca Raton.

John Poletto's legacy is one defined by unwavering dedication, expertise, and an innate ability to connect the extraordinary with the exceptional, making him a beacon of excellence in the luxury real estate industry.


Karol Elera

Executive Assistant
Director of Marketing


Karol Elera represents the Nestler Poletto team as their Executive Assistant. Karol chose to align herself with the Nestler Poletto team at One Sotheby’s Intl Realty in early 2020. She has been happy to call Boca Raton her home for over 15 years. Her knowledge of the area and resources is what makes our customer service experience a first-class experience. She has a deep local familiarity with East Boca. Karol thrives in helping our clients with a friendly demeanor.

Karol is known for her professionalism, proactive approach, and unwavering dedication to her work. Her ability to seamlessly navigate between responsibilities and collaborate with diverse teams highlights her adaptability and resilience in the face of challenges.

Outside of her professional endeavors, Karol is deeply passionate about community engagement and volunteering. She believes in giving back to society and actively participates in initiatives that aim to make a positive impact on the lives of others. She is currently a sustainer member of the Junior League of Boca Raton in which she served as leadership for the past 6 years.

Before joining the real estate industry, Karol Elera contributed her expertise to the field of human resources, gaining invaluable experience in cultivating and managing talent, which she seamlessly integrates into her current role.

Karol grew up in New York and attended Pennsylvania State University in State College, PA. She is a proud Nittany Lion. Karol moved to South Florida to attend Florida Atlantic University to pursue her master’s degree in criminal justice. The sunny weather in South Florida allows her to spend quality time with friends while dining out, reading, or enjoying outdoor activities.

Ariel Avery, a New Hampshire native, is a graduate of The University of Alabama in Tuscaloosa, Alabama, a city that became her home for a decade. Post-graduation, she dove into the world of hospitality, making invaluable contributions to the Tennessee Titans and Alabama Athletics. "Roll Tide!"

With a natural flair for connecting people and opportunities, Ariel transitioned into the real estate industry. As a West Alabama REALTOR®, she helped clients buy, sell and invest. "Buy 205" Recently, she embarked on a new chapter, relocating to Boca Raton, Florida, in search of fresh opportunities and experiences.

Today, with her eye for design and passion for the real estate industry, she works as the Marketing Assistant for the Nestler Poletto team at One Sotheby's International Realty. She is excited to build her career in luxury real estate in one of Florida's most sought-after locations.

Fun Facts:
I modeled on the box of the Easy Bake Oven, Twister and Hannah Montana Mall Madness.
I have an 8-year-old Seal Mink Bengal cat named Haven Mae. 
I have flown a FedEx flight simulator over the Eiffel Tower.