Harper Construction Co. in downtown San Diego has operated from Kettner Boulevard since the firm's founding in 1974, with current owner and president Jeff Harper continuing a design-build practice that spans military, civic, and commercial sectors. The portfolio includes an F-35 hangar at MCAS Miramar — over 200,000 work hours with zero lost time — alongside aviation control towers and military lodge projects for the Navy, Marine Corps, and Air Force, with large-format structures designed alongside architecture firms like DLR Group in the Gaslamp Quarter. LEED project analysis, registration, and certification services integrate sustainability standards into both military and civilian builds. Civilian projects span retail and community centers, single- and multi-family housing, and mixed-use complexes, with structural and site work coordinated alongside general contractors like Suffolk Construction in Harborview on multi-prime delivery models. The deepest-scope contracts involve ground-up military facility construction combining hardened structural systems, specialized mechanical environments, and secure-access infrastructure under federal procurement timelines.