Citizens for Andrew Cassilly: Ruth Carlson Treasurer



Growing up in a Catholic family with eleven children, Andrew Cassilly knows the importance of conservation. As lifelong resident of Harford County, Andrew graduated from Bel Air High School in 1984. After graduation, Andrew enlisted in the 29th Light Infantry Division of the Army National Guard, following in the footsteps of his father and two brothers. He then attended Millersville University in Pennsylvania with assistance from the GI bill.


After college, Cassilly was hired as a certified manual arts therapist at the Perry Point VA Medical Center, working with retired veterans. One year later, Andrew started his career with Harford County Public Schools (HCPS), serving as a middle and high school teacher for the first nine years. Upon earning his master's degree from Loyola University, Cassilly served as a school-based administrator at Fallston High School and later as a hearing officer for long-term suspensions in the student services department.

In his current position as resource conservation manager, Andrew has played a critical role in making HCPS more eco-friendly and energy-efficient. He has developed a wide variety of sustainable practices for the school system, including programs for single stream recycling, commercial composting, furniture refurbishing, and a rebate maximization program that resulted in over $200,000 in rebates for the school system. Due to his efforts, Andrew was honored as “Innovator of the Year” by the Maryland chapter of the U.S. Green Building Council in 2012.


In his spare time, Andrew spends time with his wife Amy, and their three children. He has served as a mentor for Big Brothers and Sisters, and as a coach for high school and recreational level sports.