State Department spokeswoman Jen Psaki would neither confirm nor deny reports that a former US ambassador to Israel, Martin Indyk, has been chosen to head up the US negotiating team.
In Amman on Friday -- at the end of his sixth trip to the region -- Kerry announced that Israeli and Palestinian leaders have agreed in principle to return to talks frozen for three years.
Israeli chief negotiator Tzipi Livni and her Palestinian counterpart Saeb Erakat are due to travel to Washington within the coming days to start the talks.
But she could not give a precise date for the resumption of talks, saying US officials had been "in touch with both parties over the course of the last couple of days, but I don't have an update on the logistics of the date yet."
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"Right now we are pursuing the way forward. There has been a great deal of work, compromise and sacrifice leading to this point," Psaki said.
But she stressed she was going to respect Kerry's commitment to keep the details of the negotiations secret in order to give them the best chance of succeeding.
"We do expect, of course, to have a senior team in place, but no decision on a negotiator or envoy has been made."
Psaki said the talks are "going to be a challenging process. (Kerry) can't carry it all on his own shoulders day in and day out. And that's why he's looking to put together a senior team."
The State Department spokeswoman also stressed that both Israelis and Palestinians "have made clear they want to have substantive discussions as early as possible."
White House spokesman Jay Carney hinted that it may take even longer for the talks to resume, telling reporters: "We are working on a date for the parties to come to Washington in the coming weeks.