Based in Harrisburg, the Keystone Contractors Association represents the leading commercial construction companies in Pennsylvania and KCA provides valuable member services such as education & training, safety, labor relations, community service, career development, and government relations. KCA has a strong presence throughout the Commonwealth of Pennsylvania in areas like: State College, Johnstown/Altoona, Harrisburg, York, Reading, Hazelton, Scranton/ Wilkes-Barre, etc.