DEC, formerly Dannenbaum Engineering Corporation, a premier civil engineering and design firm since 1945, leverages its technical expertise, relationships, and experience for client success. By understanding and responding to client needs, we strive to deliver engineering excellence, build enduring relationships and improve Texas communities with all types of public and private infrastructure. Our service offerings include: Public infrastructure Surface transportation Land development Hydrology and hydraulics Airports Ports and harbors DEC is built on a legacy of innovation, leadership, client service, and engineering excellence. More than an engineering firm, we team with clients and others to find innovative solutions to make communities better. Through the decades, we’ve partnered to provide safe water and sewer systems, address subsidence, and identify ways to fund mass transit and highway projects.