fentress went to denver, colorado as the kpf's project designer for the rocky mountain headquarters of amoco in downtown denver. attracted by the natural beauty of the area, fentress struck out on his own selecting denver as the base for his new firm, c.w. fentress and associates with james henry bradburn. in 2004, bradburn retired and, in 2007, the firm's name was abbreviated from fentress bradburn architects to fentress architects. today, the firm maintains studios in denver, colorado, los angeles, california, washington, d.c. and san jose, california.