As a journalist,  Sullivan has worked at The Face, Boy’s Own and Loaded, and for three years till 2000, was GQ’s style editor. Since then he has freelanced for among many others, The Times, Esquire, Telegraph, Independent, Guardian, Big Issue and L’Uomo Vogue  often interviewing actors such as Angelina Jolie , Daniel  Day Lewis  and Gerard Butler, director such as Ang Lee, Ridley Scott and Martin Scorsese  and recording artists such as  Iggy Pop , Liam Gallagher and Paul Weller.

He has written three books, the international bestseller Punk (with Stephen Colegrave) the definitive chronicle of club culture of the ’80s, We Can Be Heroes (with Graham Smith)  and Rebel Rebel – Mavericks Who Made Our Modern World a series of chapters each dedicated to a different  nonconformist entity.

In 2013 he realised a nine-part TV documentary series, Gangs of Britain for Skye TV. His first film, Anarchy in the UK (an Aesop’s tale for the 21st Century), is in pre production with Hacienda films while his TV series, The Fire People, adapted partly from the book by Alexander Cordell, is doing the funding rounds. 

Finally, 40 years since he first stepped into St Martins College of Art, he is back as Associate Lecturer, specialising in subculture -a subject he is rumoured to know something about!