[3] Keating played the lead role, Straight Dave, in the 2001 world premiere production of Closer to Heaven, a musical by Pet Shop Boys and Jonathan Harvey.
In February 2006 he played Maurice Travis / Jamie Barnes in Gladiator Games by Tanika Gupta at the Theatre Royal Stratford East.
[11] From 23 October to 29 November 2008, Keating played Jamie in the Leicester Square Theatre's production of Matthew Todd's Blowing Whistles, alongside Stuart Laing and newcomer Daniel Finn.
In 2015 Paul starred as Elliot Garfield in the first London production of the original Broadway version of the Marvin Hamlisch and Neil Simon musical The Goodbye Girl.
In 2016 Keating enjoyed critical acclaim for his portrayal of the title role in Mike Poulton's new play Kenny Morgan directed by Lucy Bailey.
In 2019 Paul was cast as Uncle Frank in the European premier of Little Miss Sunshine by James Lapine and William Finn - a musical, based on the Academy Award-winning movie of the same name.