John Collins has declared his interest in returning to Parkhead as director football, declaring "I've got the skillset".It's set to be a summer of upheaval in Glasgow's east end, with a new manager to be brought in and Dominic McKay replacing Peter Lawwell as chief executive.It's also expected that Celtic will appoint a director of football either working alongside head of recruitment Nick Hammond or replacing him.Brentford's John Giles and free agent David Webb has been linked with the role, as well as Manchester City loan manager Fergal Harkin and Matteo Tognozzi, chief scout at Juventus.And Collins has thrown his hat into the ring for the job, insisting he has the know-how to get his former club back on track.Speaking on BBC Radio.