Aponte joined the entertainment specialist four years ago and has worked on clients including Naomi Campbell, Joss Stone and P.Diddy. Prior to Outside, Aponte worked at Rogers & Cowan in New York.
She does not have a job lined up but said there were options brewing. 'I have had a fantastic time at Outside but I am making a change,' she said.
Meanwhile, Outside has been working with boxer David Haye, who became WBA heavyweight champion of the world last Saturday.
CEO Alan Edwards was called in two months ago to help broaden Haye's media coverage beyond the sports pages. He meets Haye's team later this week to discuss future work.