Preston Murdoch Geren Sr. (November 2, 1891 – September 21, 1969) was an American architect and engineer. Part of a prominent architectural family in Texas, he designed or served as associate architect for many of Fort Worth's most notable buildings constructed during his working life. Early life, military service and family Geren was born in Sherman, Texas, in 1891. He received a degree in architectural engineering from the A&M College of Texas in 1912 and spent two years as supervising architect for the growing Texas A&M campus. From 1914 to 1916, he was a partner in the Austin firm of Giesecke and Geren, working with Texas A&M professor Frederick Giesecke. During World War I, Geren was commissioned as a first lieutenant in the United States Army Corps of Engineers and fought in the battles of Saint-Mihiel and the Argonne, where he was wounded. For his battlefield service, Geren received the Purple Heart and the Croix de Guerre. After the war, Geren served as chief engineer at an architectural firm in Austin. In 1921, Geren married Giesecke's daughter Linda; they had three children. Professional career Between 1921 to 1923, Geren taught architecture and chaired the architecture department at Oklahoma A&M. He moved to Fort Worth in 1923 and joined the prominent firm of Sanguinet, Staats and Hedrick as chief engineer until 1934, when he founded his own practice, Preston M. Geren Architects and Engineers. At Sanguinet, Staats and Hedrick, Geren's projects included the Fort Worth Club, the Electric Building, the Texas and Pacific Passenger Terminal. In 1949, Geren's son Preston Jr. joined the practice. At Geren and Associates, Geren was responsible for the design, construction, and remodeling of hundreds of civic, commercial, religious, educational buildings in Texas. Geren was a member of the Texas Society of Architects as well as the American Institute of Architects, Fort Worth. He received the Distinguished Award of the city of Fort Worth twice. He received a certificate of merit from the Texas Construction Council in 1957. In 1956, he was named engineer of the year by the Texas Society of Professional Engineers. In 1959, he was elected as a fellow to the American Society of Civil Engineers. Geren also chaired the Fort Worth Zoning Board from 1940 to 1946. Geren's work included various building projects at the Texas Wesleyan University,University of Texas at Arlington and at Southwestern Baptist Theological Seminary, Austin, University of North Texas,