He joined the staff of the
sitcom Frasier as an executive
story editor in 1994 for the series' second year. His first produced script for the series, "
The Matchmaker", received an
Emmy Award nomination, a
GLAAD Media Award, and the 1995
Writers Guild Award for Episodic Comedy. He won a writing Emmy Award in 1996 for being one of eight writers of the classic Season 3 episode, "Moon Dance", and also received Emmy Award nominations for "The Ski Lodge" episode in 1998 and, with Christopher Lloyd, "Something Borrowed, Someone Blue," in 2000, which won the 2001 WGA award for Episodic Comedy. During his six-season tenure on
Frasier he rose through the ranks from executive story editor to co-producer, supervising producer, co-executive producer, and finally, executive producer. He was
executive producer when the series ended in 2004. He also co-wrote the
series finale, "
Goodnight, Seattle." Keenan won five
Emmy Awards during his tenure on the show. He was nominated for Outstanding Writing in a Comedy Series five times, and won once. He won the Outstanding Comedy Series award four times for his work as the show's producer. He also won two
Writers Guild of America Awards for his work on the series. ==
Desperate Housewives and beyond==