Oral history interview with David Welles conducted by Patrick Carlton on March 27, 2002 for the Building Las Vegas Oral History Project. In this interview, Welles first relates his family background and the circumstances that led to the family settling in Las Vegas, Nevada in the 1940s. He relates numerous anecdotes about growing up and attending school, and then explains how a back problem ended his chances for a career in the Navy and led him to consider less physically demanding fields. He took jobs surveying and drafting, which led to his decision to study architectural engineering, taking his degree at the University of Oklahoma. Meeting and marrying while he was in Oklahoma, the couple returned to Las Vegas, where he took multiple jobs at different architectural and engineering firms, gaining experience toward licensure as an architect. By the early 1970s, he had established his own firm with a partner, gaining a state contract to build elementary schools. Welles then speaks at length about partnering with the Daly Group to design and build the UNLV Lied Library and ends the interview with another extended discussion of his long-time involvement in the Rotary Club.