Gulf Stream School is a nonprofit institution governed by a volunteer Board of Trustees.

Charles Hagy, Jr. has been a Board of Trustees member since 2016, and chairs the DEIB (Diversity, Equity, Inclusion and Belonging) Committee and serves on the Strategic Planning Committee.

A teacher for nearly three decades, Charles is currently in his 27th year at The Benjamin School, where he serves as Head of Middle School, a role he assumed in 2003. Along with his administrative duties, Charles continues to teach U.S. History, coach basketball, and lead an advisory group.

Charles also serves as Education Committee Co-Chair for the Palm Beach Fellowship of Christians and Jews, and is a member of the Vestry at Bethesda by the Sea.

Charles and his wife, Deborah, have three children.

Karen Sweetapple returned to the board in 2021, bringing with her the experience of being a GSS parent of four over a span of 19 years (Berkley, Class of 2003; Langley, Class of 2006; David, Class of 2009; Kendall, Class of 2012).

Karen was a member of the GSS Board of Trustees for nine of those years, serving as Vice President, Secretary, Chair of the Development Committee, Co-chair of the Annual Fund (with her husband, Bob), and other committees.

She is active in the community — a Past President of Impact 100 Palm Beach County (current Advisory Council chair), Treasurer of the Antique Club of Boca Raton, and Vice President of the Women’s Club of Royal Palm Yacht and Country Club.

Dr. Rashmi Kar joined the Board of Trustees in 2022.

Rashmi graduated from the top of her medical school class at MGM Medical College in India, and is a board certified OB-GYN with a Master’s in Public Health from Columbia University. She has been a practicing gynecologist for 17 years, with an area of focus on women’s health in the underserved population through FQHC’s. Rashmi is starting a new position at Broward Health to help improve access to preventative-care services and solve health challenges that exist for women in local communities.

Rashmi and her husband, Pinaki, have three girls — Anya, Arya and Anu (the latter both Class of 2026), and have been GSS parents since 2016.

Mitch Sinberg joined the Gulf Stream School Board of Trustees during the 2022-2023 school year.

He has a background in finance and serves as Senior Managing Director – Florida Leader for Berkadia.

Mitch graduated cum laude from University of Florida in 2021, while dual-majoring in Finance and International Economics. He went on to earn his MBA from the University of Florida in 2026.

Mitch and his wife, Gina, and their two children (Dylan, Class of 2025, and Chase, Class of 2027) reside in Gulf Stream.

Mitch is an avid golfer and boater, and enjoys coaching his son’s baseball team.

Marc Julien joined the Board in August 2023.

For 15 years, Marc has been developing residential real estate and building custom homes for clients in Palm Beach County.

After surviving cancer in 2018, Marc became actively involved in raising money for the National Pediatric Cancer Foundation.

Marc and his wife, Cortney, have a daughter, Ella, in Kindergarten and a second one set to start PreK-3 next year. His brother’s three sons all attended GSS, and he and his wife have been actively involved with the school. The family are great believers in the school and the education it provides its students.

Kathy Fong is an executive at Goldman Sachs, where she has worked for more than 20 years across Controllers and Human Capital management.

Kathy and her family relocated to Florida in 2022 after living in Asia for 22 years. Prior to joining Goldman Sachs, Kathy was a controller at Brown Brothers Harriman and an auditor at Pricewaterhouse Coopers in New York.

Kathy served on the Board at the American Club of Hong Kong for five years, and is also on the Board of the Michael Manzella Foundation, a not-for-profit corporation dedicated to activities in education, children’s causes, cancer research and the arts.

Kathy has an EMBA from Kellogg-HKUST and a BBA in Finance from the University of Notre Dame. Kathy; her husband, Brandon; and their twin boys live in Boca Raton.

Since 2007, Kathy Fazio has been the Executive Director of Paul’s Place After School, a local nonprofit focused on the needs of underserved children in the Delray Beach community. She is also a former Board member of Roots and Wings, and a current Board member of the Beach Property Owners Association.

Kathy and her husband, John, have lived in Delray Beach for 35 years, raising two GSS alumni, Annie Hardy (Class of 2001) and Jay Fazio (Class of 2003). Kathy’s eldest grandchild is a current student in Pre-K-4.

Denise is a native of Delray Beach, Florida, and a dedicated mother of three: Ayva (5), Kayden (3), and RJ (19).  She has always had a passion for learning. This passion led her to Florida Atlantic University, where she earned degrees in education, mental health counseling, and psychology.

For over a decade, she’s worked at post-secondary institutions, developing and managing programs that help students thrive and reach their full potential.

Currently, Denise is pursuing a Ph.D. in experimental research psychology at FAU. Her work utilizes fMRI technology to examine how perceptual experiences with familiar and unfamiliar faces influence neural development. When she’s not immersed in teaching, research, or professional pursuits, she enjoys playing music—primarily the guitar and organ—and spending quality time with her family.

Katherine Orthwein (’00), an alumna of Gulf Stream School, joined the Board of Trustees in 2024, where she serves on both the Strategic Planning and 1938 Committees. She graduated with honors from Washington University in St. Louis with a triple major in Finance, Marketing, and Entrepreneurship, before earning her MBA from MIT, where she refined her expertise in finance, strategy, and innovation.

As Managing Partner of North Haven Investment Group LLC, a single-family office, Katie focuses on balancing long-term investment management with strategic growth. She and her husband, Brendan, also co-own Johnny Mangos Garden Center, combining their shared passion for nature, design, and community.

Dedicated to preserving Gulf Stream’s charm while embracing its future, Katie serves on the town’s Architectural Review and Planning Board. She and Brendan are the proud parents of Alexandra (Class of 2032) and Hunter (Class of 2034), ensuring that the next generation experiences the same magic that first inspired her.

Mr. Konert is a Managing Partner and member of the Investment Committee at AE Industrial Partners, a market leading investor in National Security and Space. Mr. Konert is Chairman of Firefly Aerospace and also serves on the Board of Directors of AE Industrial portfolio companies: BigBear.ai, Calca Solutions, Columbia Helicopters, Firefly Aerospace, Redwire, Thayer Mahan and York Space Systems. He previously served on the Board of Directors of Gryphon Technologies, prior to its sale to ManTech International Corporation in 2021, American Pacific Corporation, prior to its sale to NewMarket Corporation in 2024, and Belcan, prior to its sale to Cognizant in 2024.