Locations 2235 Mercury Way, Suite 150, Santa Rosa, CA, 95407, US One California Street Suite 1450, SAN FRANCISCO, CA, 94111, US 2300 Clayton Road, Suite 920, Concord, CA, 94520, US 943 Reserve Drive, Roseville, CA, 95678, US . Provide on-site observation of construction activities including reviewing materials and installation against contract documents and approved submittals for civil, piping, structural, architectural, mechanical, electrical, instrumentation, and controls .