The batsman will begin a re-integration process back into the national side after initially being snubbed for sending 'provocative' messages to members of the South Africa team regarding his teammates, with one thought to be former Test captain Andrew Strauss.
"It's been a horrible situation for all involved, but it is time to move forward," said Pietersen in a press conference. "All being well I'll be back in an England shirt as soon as possible.
"I am committed to completing the re-integration process we have agreed over the coming weeks and resuming my England career in all formats, hopefully until the World Cup in 2015, as long as my body allows.
"I want my son growing up seeing me playing for England and I hope one day he will put an England shirt on himself."
ECB managing director Giles Clarke added: "Kevin has signed a central contract today. Andy Flower will determine the progress of the re-integration process. It could be soon, it could be much later."
There has been no confirmation as to whether Pietersen will be involved in England's Test squad for their tour of India later this month.