TV
Rex Features
The 66-year-old said that he will concentrate on writing his memoirs, though he did not completely rule out a future return to TV.
Sissons said: "I do feel I'm still on top of my game and I still enjoy it. I don't know how much I'll miss it until I stop but I don't think I'll be sitting in a darkened room.
"I've started my memoirs but I haven't got past the early years yet. I haven't got a title in mind, it doesn't even have a publisher."
He added: "I'm proudest of launching Channel 4 News, which I did for seven years.
"While I was there, it was nominated for a Bafta five years running and won three times. The format we settled on is exactly what you see today. It's still the show to beat."
During his 45-year career, Sissons presented news programmes for Channel 4, BBC and ITN, stepping down from the BBC's Ten O'Clock News in 2003.
More: Peter Sissons, TV
Tube Talk
'Freaks and Geeks': Tube Talk GoldTube Talk Gold heads back to the '80s and remembers Freaks and Geeks.
TV Interviews
'Celebrity Apprentice' Debbie Gibson Q&ADebbie Gibson opens up about her Celebrity Apprentice experience.
Reality Bites
Does Simon Cowell have new SuBo?: VideoWatch a clip of Jonathan Antoine, who is tipped for success on BGT.
TV Ratings
Judi Dench draws 4.1m on 'Graham Norton'ITV1 pips BBC One to the highest primetime audience share.
