When Israel and the U.S. launched their first strikes on Iran, Ron Dermer was in Australia, about as far as one could get from the Israeli Prime Minister’s Office in Jerusalem or the Defense Ministry in Tel Aviv. He soon found himself, like many other Israelis wanting to get home from abroad, on a plane to Taba, Egypt, from which point he would cross back into Israel, where airspace remains restricted.

Since November, when he resigned from his official post as strategic affairs minister, Dermer has spent most of his time traveling for speaking engagements. But now, two sources with knowledge of the matter confirmed to Jewish Insider, Dermer is back again in public service. 

He may not have an official title, but he is doing what he has done for the previous three years — serving as Israeli Prime Minister Benjamin Netanyahu’s closest and most trusted advisor. Israel’s Walla News quoted a source in the Prime Minister’s Office who said Dermer was reporting for “reserve duty,” like over 100,000 other Israelis since the outset of the war with Iran.

Netanyahu and Dermer’s relationship has been so close for the past 26 years that Dermer has been called the prime minister’s third son and nicknamed “Bibi’s brain.” With a very small inner circle and few advisors whom he truly trusts, Netanyahu views Dermer as a critical asset to his team at a time when the U.S. and Israel are making decisions that will determine the future of the Middle East for years to come.

Dermer is also known as having a good relationship with the Trump administration, and has reportedly been taking part in Netanyahu’s nightly calls with President Donald Trump. 

Those relationships have served Dermer well. When Trump presented his 20-point plan to end the war in Gaza last September, he repeatedly said, “Right, Ron?” addressing his remarks to Dermer, who was sitting in the front row.

Trump and Netanyahu have been remarkably in sync since the war began on Feb. 28. But some cracks are beginning to show: After the IDF bombed an Iranian fuel depot earlier this week, Trump administration sources leaked that they thought Israel went too far. 

Trump has sent mixed messages about the expected duration of the war, saying on Monday that it is “very complete,” but also “could go further,” while Netanyahu said on Saturday night, “We are continuing with full force.” 

Dermer may well be the point person tasked to smooth over the differences that are likely to come up between the leaders. Netanyahu is counting on it.