Mosley's abilities have been widely praised, including by former Genesis guitarist Steve Hackett, Meshuggah drummer Tomas Haake and critic John Franck of AllMusic.

In 1981, Mosley joined former Genesis guitarist Steve Hackett and played on the Cured tour, recordings later released on the live album Time Lapse.

[7][8][9] Music critic John Franck stated Mosley's "spot-on drumming was the perfect foil for Marillion's meticulous musicianship".

[11] In 1994, Mosley played on John Wesleys debut album, Under the Red and White Sky on the tracks None So Beautiful and Thirteen Days.

[14] The project was called Iris, and the album Crossing the Desert was released in April 1996 on the Racket Records label.

[19] Mosley has been cited as an influence by Tomas Haake, drummer of Swedish extreme metal band Meshuggah.

[20] Mosley has stated that he enjoys "playing arrangements kind of in a classical format, which is in movements" but, despite his membership of several progressive rock bands over the course of his career, he does not believe in music labels and distances himself from the "progressive label" that "involves lyrics that quote dancing gnomes, Stonehenge and fairytales, etc.