Fleitz served in U.S. government national security positions for 25 years with the Central Intelligence Agency, Defense Intelligence Agency, Department of State, and the staff of the U.S. House Committee on Intelligence. Fleitz spent 19 years with the CIA. He wrote the 2002 book, Peacekeeping Fiascoes of the 1990s: Causes, Solutions, and U.S. Interests. From 2001 to 2006, Fleitz served as chief of staff to Undersecretaries of State for Arms ControlJohn Bolton and Robert Joseph. Arianna Huffington described Fleitz in a 2005 article as "Bolton's chief enforcer." Fleitz's name first hit the press in the spring of 2005 during the battle in the Senate Foreign Relations Committee to confirm Bolton as U.S. Ambassador to the United Nations. Several accounts describe difficult challenges Fleitz faced as Bolton's Chief of Staff, mostly involving conflict over a controversial speech Bolton delivered on a possible Cuban biological weapons program. Most contemporaneous press accounts in 2005 portrayed this matter as a personnel dispute over a disagreement with two intelligence officers over assertions Bolton wanted to make in the speech. In his own testimony, Fleitz said one of the analysts had forwarded Bolton's speech for the CIA to review, but attached his own dissenting commentary and then denied doing so. This led to a confrontation and an apology from the analyst's supervisors. Fleitz testified that the other analyst campaigned against the speech after it had been delivered to Congress and the press. Investigative reporterKenneth Timmerman in his 2007 book Shadow Warriors wrote that controversy over Bolton's 2002 Cuba speech stemmed from heavy pressure from a small number of intelligence officers who favored a softer line on Cuba. Timmerman claims these intelligence analysts politicized Bolton's text and that Fleitz resisted their efforts. Rowan Scarborough, in his 2007 book Sabotage: America's Enemies Within the CIA, came to a similar conclusion and wrote that Fleitz paid a professional price for defending Bolton and standing up to political pressure from rogue CIA and State Department intelligence analysts. From 2006 to 2011, Fleitz was a senior staff member with House Intelligence Committee and a senior adviser to committee ranking memberPeter Hoekstra.
Post-Government Career
In 2011, Fleitz was hired by the right-wing organization Newsmax Media to found the Langley Intelligence Group Network, an online international analysis and forecasting service. He served as the LIGNET Director until 2013 when he was named a senior fellow with the Center for Security Policy, run by Frank Gaffney, an anti-Muslim activist and conspiracy theorist. In February 2015, Fleitz became senior vice president for policy and programs. In his writings for the Center, Fleitz claimed that major American Muslim organizations and mosques were secretly working to advance a jihadist agenda, that such groups should not be trusted when they claim to "eschew violence" and that they should be "neutralized as political forces."
In April 2018, John R. Bolton was appointed National Security Advisor for President Donald Trump. Fleitz had previously served as Bolton's Chief of Staff at the State Department during the Presidency of George W. Bush. Bolton selected Fleitz to serve as his NSC Chief of Staff, replacing Keith Kellogg. He left his position on October 31 of that year to rejoin the Center for Security Policy and was succeeded by Joan Virginia O’Hara.
