The man expected to represent the US-backed Board of Peace in Gaza, Bulgarian politician and diplomat Nickolay Mladenov, has in recent days already held meetings with Israeli and Palestinian officials.
Mladenov has experience in the region, having served as the UN envoy for the Middle East peace process from early 2015 until the end of 2020.
Media reports say he is expected to be the representative on the ground for the board, which is to be created as part of the Gaza ceasefire agreement brokered last year by US President Donald Trump.
Trump himself is set to chair the board.
US media outlet Axios reported that the US president is expected to announce the board's membership next week and that it would include around 15 world leaders.
"Among the countries expected to join the board are the UK, Germany, France, Italy, Saudi Arabia, Qatar, Egypt and Turkiye," it reported.
Shortly after meeting Israeli President Isaac Herzog on Thursday, Mladenov held talks with Prime Minister Benjamin Netanyahu in Jerusalem.
Yesterday, Mladenov visited the occupied West Bank city of Ramallah, seat of the Palestinian Authority, to meet Palestinian vice president Hussein al-Sheikh.
In a statement on X, Sheikh said that the discussion focused on "the situation in the Gaza Strip, means of transitioning to the second phase," of the fragile ceasefire that took effect between Israel and Hamas in October, and implementing Trump's plan.
Under the 20-point programme, Gaza is to be governed by a transitional and technocratic Palestinian committee, under the oversight and supervision of the Board of Peace.
During the second stage of the ceasefire, Israel is supposed to gradually withdraw from its positions in Gaza, while Hamas is supposed to lay down its weapons.
An international stabilisation force is also to be deployed.
The US and regional mediators are keen to move to the second phase, but progress has stalled, with each side accusing the other of violations.
Gaza's civil defence agency — which operates as as rescue force under Hamas authority — said Israeli attacks in the territory on Thursday killed at least 13 people, including five children.
The Israeli military said it "precisely struck Hamas fighters" in response to a "failed projectile" launch.
Writing for the Washington Institute for Near East Policy in October, Mladenov said that "sustained US engagement will be essential, alongside the willingness of European and regional partners to contribute both funds and troops."
Mladenov was Bulgaria's defence minister and then foreign minister from 2010 until 2013, before serving as the UN's special representative for Iraq.
"He does not view diplomacy as mere bargaining. He knows that setting a goal and having the will to achieve it is just as important," said Vessela Tcherneva of the European Council on Foreign Relations who previously worked as Mladenov's spokesperson.
A senior diplomat in the region told AFP that Mladenov had channels open with a range of actors, including both Israelis and Palestinians.
"What we're really hoping for here is basically a miracle: that he finds the one thing that finally shifts the whole thing."