The American security contractor listed his new employer as "confidential" but spelled out details of the job online.
Michael Reynolds was working on a project he described as a "US-Israel partnership".
According to his LinkedIn profile, he previously held a senior role with what a prominent US civil rights legal centre claimed was an "anti-government extremist organisation".
In May, Mr Reynolds became a security contractor for a "humanitarian aid program" in Gaza.
Further online searches by the ABC identified Mr Reynolds as an employee of UG Solutions, a security provider for a mysterious aid agency embroiled in international controversy.
The US and Israel-backed Gaza Humanitarian Foundation (GHF) has supplanted the United Nations as the main provider of aid in Gaza, home to about 2.1 million people.
Half a million are on the brink of famine and the rest are experiencing emergency levels of hunger, according to the World Food Programme.
As Israel faces a groundswell of international pressure amid growing evidence of starvation — which Israeli Prime Minister Benjamin Netanyahu disputes — GHF aid hubs have become known among Palestinians, human rights campaigners and UN-appointed experts as "death traps".
Almost 800 people were killed near GHF sites in the first eight weeks of operation, the UN says.
Critics say GHF's provision of aid at just four sites on a "first come, first served" basis during restricted hours has exposed huge crowds to the risk of deadly encounters with the Israel Defense Forces (IDF).
A former UG Solutions contractor, Anthony Aguilar, went public last month with allegations he witnessed war crimes by IDF soldiers firing on crowds with guns, mortars and tank rounds.
Both UG Solutions and GHF denied the claims.
A retired US special forces officer, Mr Aguilar said the chequered backgrounds of some security contractors around him fed his concern about a lack of professionalism among those delivering aid in Gaza.
Many had been recruited from the ranks of a US military motorcycle club, "Infidels MC", he said.
Expat pays family to 'stay home'
Sami Muamar, a Palestinian-born educator in Brisbane, says he has implored family members living in southern Gaza to avoid the GHF aid site at Khan Younis altogether.
Instead, he sends money for them to buy food at inflated prices on the black market.
"It costs me a lot of money, we pay probably $50 per kilo of flour right now," he says.
"I said I don't want you to risk anybody's life, just to stay home.
"I'm trying to make my family stay home as much as possible, not to go for the humanitarian aid, because it is really a trapping zone."
Israel blocked all aid to Gaza for 11 weeks from March 2 to May 21, banning staff from the UN's own relief agency from entering the strip over contested claims of Hamas infiltration.
It says the new scheme stops Hamas profiteering from aid.
However, an internal US government analysis reportedly found no evidence of this happening with US aid, findings that were challenged by the White House.
US members of Congress have raised concerns about the "militarisation" of aid through GHF's involvement with both the IDF and armed US contractors, and its lack of experience delivering humanitarian aid.
Many observers say aid providers should be impartial and independent of military forces.
Fears GHF 'not all it claims to be'
Australian lawyer Chris Sidoti, who co-chaired the UN Commission of Inquiry into the Occupied Palestinian Territory and Israel, says the secrecy around GHF raises suspicions about its true purpose.
"No one really knows where [GHF] came from, who set it up, whose idea it was, who's funding it, and where they're sourcing their personnel," Mr Sidoti told the ABC.
"Except, we do know that a number of the American security guards are former military personnel, so whether that means that they've totally divorced themselves from any contact with the military — or for example with the CIA — is something that no one knows.
"The extent to which there is so much secrecy surrounding GHF can only feed into fears that it's got a very shady background and that it's not all that it claims to be."
Aid at 'exorbitant cost'
GHF planned to set up a Swiss bank account option for donors but settled on registration in the secretive US tax haven of Delaware in February.
Its executive director, former US Marine Jake Wood, quit before its aid hubs even opened.
"I am proud of the work I oversaw, including developing a pragmatic plan that could feed hungry people, address security concerns about diversion, and complement the work of longstanding NGOs in Gaza," Mr Wood said in a statement.
"However, it is clear that it is not possible to implement this plan while also strictly adhering to the humanitarian principles of humanity, neutrality, impartiality, and independence, which I will not abandon."
He was replaced by Reverend Johnnie Moore, a "close ally" of US President Donald Trump, according to Democrat lawmakers, and a leader of the International Fellowship of Christians and Jews.
GHF claimed to have launched operations with almost $US120 million ($183 million) of funding from "other government donors".
Israel denied it was among them, despite reports that the government covertly poured about $US280 million into the GHF "aid mechanism".
The US state department approved a $US30m grant to GHF in June, reportedly despite objections from USAID officials, including one who found it failed to meet "minimum technical or budgetary standards".
Democrat lawmakers say this is "troubling" and that GHF aid hubs appear to "operate at a reduced capacity at an exorbitant cost" way beyond those of "experienced humanitarian organizations".
They have demanded an investigation of GHF and say full disclosure of its funding is "imperative".
US contractor linked to 'extremist' organisation
GHF runs its aid hubs in Gaza with two private American firms — Safe Reach Solutions and UG Solutions — providing security and logistics.
The online footprints of some of these contractors offer a glimpse of GHF's close alignment with the US and Israeli governments.
They are also a window into the backgrounds of some of those now responsible for delivering most of the aid in Gaza.
According to his LinkedIn profile, contractor Michael Reynolds's role with UG Solutions includes ensuring "the safety and operational continuity of US and Israeli personnel".
It also involves following "US Department of State and host nation security directives" and coordinating "closely with multinational military [and] governmental partners".
Anthony Aguilar told the ABC that he recognised Mr Reynolds as one of those providing "static site" security for GHF in southern Gaza.
He said Mr Reynolds's role was "crowd control" and that he was "armed with a fully automatic rifle, a combat pistol, stun grenades, tear gas and riot baton".
Mr Reynolds previously worked for Mayhem Solutions Group, an Arizona-based security and intelligence outfit that was involved in reconnaissance patrols of the Mexican border and was associated with the hard right of US President Donald Trump's MAGA movement.
Mr Reynolds was "vice-president of global risk solutions" for Mayhem when it was alleged to be an "anti-government extremist organisation" by the Southern Poverty Law Centre (SPLC) in 2022.
SPLC has been monitoring and taking legal action against extremist groups since the 1970s, and partnered with law enforcement including the FBI.
SPLC's claims about Mayhem would place it in the same category as militias such as the Oath Keepers, whose leader was jailed for seditious conspiracy over the January 6 insurrection in Washington before Mr Trump pardoned him.
Mayhem was reportedly paid up to $US20 million by a Texas state contractor to help transport immigrants and asylum seekers interstate in what a whistleblower claimed were "disgusting and inhuman" conditions.
Mayhem also shared intelligence and data on border crossings with The America Project, an organisation that was co-founded by former Trump national security advisor Lieutenant General Michael Flynn and funded political candidates who denied the results of the 2020 US election.
SPLC claims "anti-government groups" such as Mayhem are "part of the anti-democratic hard-right movement".
"They believe the federal government is tyrannical, and they traffic in conspiracy theories about an illegitimate government of leftist elites seeking a 'New World Order.'"
Contractors run by ex-US Special Forces and CIA
A spokesman for UG Solutions did not directly address questions about specific employees.
He said the company "hires only experienced professionals — primarily former US Special Operations Forces and intelligence personnel — who have demonstrated years of operational excellence".
"Each individual undergoes extensive vetting, reference checks, and must meet our stringent standards for weapons proficiency and operational conduct prior to deployment, including qualifying on their weapons.
"Every team member undergoes comprehensive background checks, and only qualified, vetted individuals are deployed on UG Solutions operations."
UG Solutions's chief executive is a former US Army Special Forces soldier and its "head of talent acquisition" was an army counterintelligence officer.
Neither man could be reached by phone.
The ABC spoke briefly to a former US Army staff sergeant employed by UG Solutions as an "international humanitarian security officer".
"Our details are being leaked all over the place," he said.
"I can't give a comment at this time, thank you."
GHF's other security provider, Safe Reach Solutions, was founded by former senior CIA operative Philip Reilly.
Mr Reilly was the deputy chief of Operation Jawbreaker, the CIA's response to the 9/11 attacks in 2001, and was then among the first US agents on the ground in Afghanistan, where he became chief of "the largest [CIA] station in the world at the time".
Until last December, he was also a senior adviser at Boston Consulting Group, where two senior partners reportedly met with Israeli officials to work out how GHF would operate and set prices for the security contractors.
Boston sacked the partners in June, saying the work for GHF was "unauthorised".
Mr Reilly's employees now include a former Pentagon official who led a review of close-combat operations during the first Trump presidency, a former US State Department official who became an Air Force intelligence officer, and a former US Army logistics officer who advised the Palestinian Authority on vehicle and small arms maintenance.
For all that, the US members of Congress demanding an investigation say they have "serious concerns" that GHF and its partners, with no prior humanitarian experience … could become the sole or primary aid provider in Gaza".
'More will die from starvation than bombardment'
Mohamed Duar, Amnesty International Australia's spokesperson on the occupied Palestinian territories, says GHF is an "illegitimate and inhumane aid agency" that was never going to replace the work of others in Gaza, including the UN's relief agencies.
"The alarming concern is that GHF puts Israeli forces and possibly paid mercenaries in charge of aid delivery," he says.
"Humanitarian aid principles should never be politicised or weaponised."
Mr Duar offers the grim prediction that "more people will die from starvation than will die from bombardment to date".
The Israeli military campaign has killed more than 60,000 Palestinians in almost 22 months, according to the Gaza health ministry.
It was triggered by Hamas's attack on Israel on October 7, 2023, which killed about 1,200 people and took 251 hostage — 49 of them still held in Gaza, with 20 believed to be alive — by Israeli tallies.
Mr Sidoti says the failures of GHF raise the possibility that it was merely a ploy to pay lip service to international concerns.
"The killings continue. The whole exercise has been an absolute shambles," he says.
"I just wonder whether the whole thing was never intended to have any particularly useful purpose at all, and it's just an excuse that Israel and the United States hide behind to pretend that they're doing something … because the pressure has been clearly building."
