In November 1970, he took over production of The Doors' L.A. Woman album - their last with lead singer Jim Morrison - after the band's long-serving producer Paul A. Rothchild fell out with the group over the album's direction. Bruce also has a credit as assistant engineer on the Rolling Stones Let It Bleed album. He later produced Eddie Money's first two albums, Eddie Money in 1977 and Life For The Taking in 1978. Botnick also produced two albums for Paul Collins' rock group The Beat, including 1979's The Beat and 1982's The Kids Are The Same.
Botnick had a long-running association with film composer Jerry Goldsmith as his scoring recordist and mixer. Botnick first met Goldsmith on 1979's Star Trek: The Motion Picture and they worked together on most of Goldsmith's film projects - numbering over 100 - from the 1980s through to Goldsmith's death in 2004.