Building construction services; General contracting services in the field of commercial building construction; Pre-construction services; Construction management; Construction supervision; Design-build services; Structural and site concrete work and structural steel erection; Construction of commercial, educational, institutional, industrial, retail and medical buildings; Renovation and repair services for buildings; Real estate development; Land development services, namely, planning and real estate development of residential and commercial communities; Building inspection, namely, inspecting structural, mechanical, electrical systems of buildings and commercial, industrial and institutional facilities; and Consulting services in the design and development of preventive maintenance programs for the structural, mechanical, electrical systems of buildings and commercial, industrial and institutional facilities