Church Staff
Tom Unkenholz | Pastor
Tom began his ministry as pastor of Harrison Presbyterian in September 1998. A native New Yorker, born and raised on Long Island, he is a graduate of the State University of New York at Stonybrook (B.A.) and Reformed Theological Seminary in Orlando (M.Div.). Tom and his wife, Stacy live in Mamaroneck. Tom loves the beach, spending time with family, and beating up on Youth Group students in a game of "Elimination."
Jay Castelli | Minister of Music
Jay Castelli was baptized in Harrison Presbyterian Church where his mother was the Organist/Choir Director. He has served as Minister of Music on and off for over 35 years. He has a Bachelor's Degree in English with a Music minor from Yale University and an M.B.A. from Pace University. Jay lives in Rye Neck with his wife, Carolyn. his spare time, he enjoys reading on personal finance, cross-country skiing, and playing tennis.
Karen Rivituso | Church Administrator
Karen, a true Jersey girl, was born and raised in Union, New Jersey and came to Mamaroneck, New York after marrying her husband, Michael in 1997. While searching for a church, she found HPC where her two sons, Raymond and Michael later attended preschool. Karen is a graduate of Douglas College/ Rutgers University. She is a committee member of Swim Across America - Long Island Sound for over 25 years. She loves spending time with family and friends, creating art, playing the piano and ukulele, reading and gardening. Her happy place, other than HPC, is Cape May, New Jersey.
Heidi Smith | Preschool Director
Heidi Smith is a forever mom, eternal educator, animal advocate, nature fanatic and consummate artist. Whether in her dual role as the Program Director and Head Pre-k teacher at Harrison Presbyterian Preschool, or in her K-5 after school art classes and academic tutoring sessions, she gets to share these passions with students, staff and parents on a daily basis. She received her bachelors from NYU and her Masters in Education at Teacher’s College, Columbia University.