Before joining Hershey Trust Company, Estey was a partner at Ballard Spahr LLP in Philadelphia, where he was a Co-Chair of the Government Relations and Regulatory Affairs Group.[3] He has served as the Chairman of the Board of Commissioners of the Delaware River Port Authority and as Chairman of the Board of Directors of the Philadelphia Regional Port Authority.[4] He serves as Chairman of Board of Directors of the Independence Visitor Center in Philadelphia,[5] and is a member of the Boards of Directors of the Gettysburg Foundation and the Greater Philadelphia Tourism Marketing Corporation.[6]