The 477th Civil Engineer Squadron is a United States Air Force unit responsible for engineering services and base operations support. As part of the Air Force's Air Combat Command, this squadron ensures the infrastructure and environmental readiness of its assigned bases. Its duties encompass facilities management, disaster response, utility systems operation, and various civil engineering projects that maintain the safety, security, and functionality of the airfields and surrounding areas under its jurisdiction. The 477th Civil Engineer Squadron operates primarily at Joint Base San Antonio in Texas.