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Maureen’s Haven Team


Daniel O’Shea, MS

Executive Director

Dan joined Maureen’s Haven in 2018 and brings over 20 years of dedicated service and experience working with underserved populations. Dan is a staunch supporter and advocate for the homeless in our community, where he lives with his wife, Jennifer and son, Hudson. Dan started his career on the East End of Long Island working for Southampton College, and has worked for prominent organizations such as PR Newswire and the March of Dimes.

Dan received his MS from St. Joseph’s College where he was awarded the 2019 Human Services Alumni of the Year Award. He received his BA from Long Island University, Southampton College. As a life-long East End resident, Dan has been committed to serving the community and helping those individuals most in need.

Mary Caffrey, LMSW

Social Worker

With over 30 years of social work experience, Mary has built a reputation as an unequivocally empathetic and consistent advocate for those in need. She worked with students at Sachem Schools in Suffolk County providing individual and group counseling for most of her career. She then went on to help adults receive English as a new language service at BOCES, an educational cooperative of Long Island school districts, which led her to her current post at Maureen’s Haven. For the past two years, Mary has supported the guests at Maureen’s Haven by helping them receive social services and other benefits.


Russell Blue


Russell Blue, a licensed architect and credentialed LEED professional, has been living, working and creating beautiful homes and spaces in the Hamptons and NYC for over 25 years. He has been working to help the less fortunate for the last twenty years when he started playing in the Artist-Writers Charity Softball Game with several of his close friends. Russell has cherished the opportunity to play in a game that four local charities continue to benefit from including the Phoenix House and the East End Hospice. In 1999, he and 30 East End softball players flew down to Cuba to help build a bridge, donate mitts and equipment, and build friendships with baseball players in need from Havana. Russell is a long-time participant in the Wounded Warrior Project, a charity that offers services to wounded veterans, as well as volunteering close to a decade with the Ellen Hermanson Foundation/Ellen’s Run, a vital organization that helps and supports women on the East End stricken with breast cancer, and where his wife is the Director of Special Event.

In 2008 the love of his life, Sara, became the coordinator for Maureen’s Haven Homeless Outreach program at the Jewish Center of the Hamptons. It was then that Russell started seeing what a difference this charity has made in the lives of the local population becoming a volunteer on a regular basis up to this day with his wife. Russell joined the Maureen’s Haven Board in the summer of 2016 and has been integral in fundraising. Russell is truly looking to lead the organization forward in its quest to help the less fortunate. He has one son, Dylan, age 24, who has been an actor since the age of 9, and is continuing to act, direct and make movies. He resides with his family in Water Mill.

David Agtsteribbe


David proudly served eight years in the U.S. Army. David was wounded in combat and awarded a Purple Heart by President Ronald Reagan. David worked for four years as the personal bodyguard and security detail coordinator for Benjamin Rothschild and then was a stockbroker for three years before opening his own telecom business. David is also a member of BNI, the Hampton Bays Rotary Club and is a proud member of the Hampton Bays American Legion. He lives in Hampton Bays with his wife Mary, and his daughter Mia and son Michael. David is proud to be involved with an organization of the caliber of Maureen’s Haven.

Sherri Williams


Sherri has been a Managing Director at The Raine Group since 2011, a NYC-based merchant bank. At Raine, she is the Head of IR and Fundraising for the firm’s three investment strategies that total over $3bn in AUM. Prior to joining Raine, Sherri was a senior investment banker at Montgomery & Co., a west-coast based firm, JPMorgan, Rothschild and Credit Suisse. She has worked on a variety of debt, mezzanine and equity capital raises for both domestic and European companies. Sherri has a B.S. from Georgetown University where she played on the Division I tennis team and has an M.B.A. from Cornell University. She is also on the Board of Trustees for the Randall’s Island Park Alliance. Sherri has had a home in Quogue for over ten years; she believes Quogue is as much her home as is NYC and is committed to helping the under-served and is proud to be on the Board.


Seth Berman

Seth has lived on Long Island for all but two years of his life and has been married to his wife Jeannette for 22 years. While new to the board at Maureen’s Haven as of the summer of 2020, Seth has served his temple for 19 years and had held various leadership positions including President and Vice President in charge of the building, Vice President in charge of the office and currently Vice President in charge of fundraising. Prior to serving on the board of his temple Seth was a board member at his condominium community and held the position of Vice President. Seth was in the mortgage industry for over 20 years in various positions before deciding to start his own photography business. While photography was a lifelong hobby of his he is happy to finally make it his career. Seth runs Rapid Shutter Photography. Serving the community is important to Seth and he is pleased to have joined the Board of Maureen’s Haven.

Jennifer Gunn

Jennifer is originally from Philadelphia and moved to Eastern Long Island and raised her two children (Caelan and Ryan) with her husband and fellow Board Member Patrick Gunn. Jennifer received a B.A degree from Long Island University (Southampton College) and an M.B.A from Dowling College. Jennifer previously worked for the U.S. House of Representatives (NY1) and is now working as a Marketing Manager for Teachers Federal Credit Union specializing in community outreach. After working with Maureen’s Haven professionally for many years Jennifer has now made it personal and is excited to be part of the Maureen’s Haven Board.

Patrick Gunn, Esq.

Patrick is originally from Queens, NY and moved to Eastern Long Island and raised his children (Caelan and Ryan) with his wife and fellow Board Member Jennifer Gunn. Patrick is a U.S. Navy veteran and is a member of the American Legion and Veterans of Foreign Wars. Patrick received a B.A degree from Long Island University (Southampton College), an M.B.A from Long Island University, and a J.D. from Touro Law School. Patrick is a former Suffolk County prosecutor and is now working as an attorney in private practice. Patrick has seen the impact of homelessness on society from many perspectives and is excited to be part of the Maureen’s Haven Board.