Founded in 2011, Siegfried Engineering & Construction, LLC (SEC) is a Houston-based engineering and consulting firm established to deliver planning, design, and construction management services to public- and private-sector clients. As a DBE and HUB-Zone business, SEC works with city, county, state, and federal agencies to develop traffic & transportation design, construction engineering & Inspection (CEI), land development, and public works projects. Clients include TxDOT, City of Houston, Harris County, Montgomery County, HCTRA, and NTTA. Founder and President, Robert Siegfried, offers over 34 years of experience in planning, engineering, and construction management. He earned a BSCE from the University of Houston and an MBA from Rice University. We are Administratively Qualified to work with TxDOT in the following thirty precertification categories: 1.1.1 Policy Planning; 1.2.1 Systems Planning; 1.3.1 Subarea/Corridor Planning; 1.4.1 Land Planning/Engineering; 1.5.1 Feasibility Studies; 1.6.1 Major Investment Studies 2.2.1 Air Quality Analysis; 2.12.1 Socio-Economic And Environmental Justice Analyses; 3.2.1 Route Studies & Schematic Design 4.2.1 Roadway Design; 4.4.1 Freeway Interchanges 7.1.1 Traffic Engineering Studies; 7.3.1 Traffic Signal Timing; 7.4.1 Traffic Control Systems Analysis, Design And Implementation; 7.5.1 Intelligent Transportation Systems 8.1.1 Signing, Pavement Marking, And Channelization; 8.2.1 Illumination; 8.3.1 Signalization; 8.4.1 ITS Control Systems Analysis, Design & Implementation; 8.5.1 Highway-Rail Grade Crossing; 8.6.1 Rail-Highway Design 9.1.1 Bicycle And Pedestrian Facility Development 10.4.3 Pump Stations-Structures 11.1.1 Roadway Construction Management And Inspection; 11.2.1 Bridge Construction Management And Inspection