Hibbert had a starring role as Faulconbridge in the BBC's production of The Life and Death of King John, published in 1984.

[4] Hibbert was in the Broadway musicals The Drowsy Chaperone and the 2007 premiere of Curtains (which reunited him with his Frasier co-star David Hyde Pierce).

He appeared on Broadway as "Mr. Praed" (the architect) in Roundabout Theatre's 2010 production of Mrs. Warren's Profession starring Cherry Jones.

[6] He guest-starred on TV shows including Cosby, Murder, She Wrote and Law & Order: Special Victims Unit[7] but is probably best known for his recurring role on Frasier as Gil Chesterton, KACL's haughty, effeminate restaurant critic.

He has authors Chuck Palahniuk, Christopher Bram, Steven DeRosa, and Ed Sikov among his clients[5] and has also represented film rights for Fight Club and Gods and Monsters plus others.

James Curtis, who was represented by Olson for a number of years and sold four books with the agent (including the Pantheon-published 2015 title William Cameron Menzies), said his initial interaction with the bookkeeper, Darin Webb, led him to believe he was dealing with a case of negligence.

He noted that after contacting Webb repeatedly about a check for a "piddly sum of money" that had gone missing, he just assumed "Darin was incompetent."