David Sean "Gleeso" Gleeson (born 3 June 1968) is the lead singer of Australian hard rock group The Screaming Jets.

The Screaming Jets moved from their hometown Newcastle to Sydney's notorious Kings Cross district in early 1990, and recorded their debut album All For One in mostly midnight to dawn sessions at a local studio, after playing live shows seven nights a week.

By mid-year he was hosting two shows, Access All Areas and Rock of Ages, interviewing artists including Jimmy Barnes and Don McLean, and giving an inside view of the music industry.

Late that year Gleeson recorded an album, Take It to the Streets (31 August 2012), with his childhood idols, The Angels, as their new lead singer, and they completed a national tour.

On 29 May 2023, he announced he would be leaving The Angels to focus on his Triple M nights radio show and on releasing a new studio album with The Screaming Jets.