https://foreignpolicy.com/2010/02/17/why-did-david-kilcullen-leave-the-crumpton-group/

David Kilcullen, the former Australian military officer who became a key architect of the "surge" strategy in Iraq, is among the most respected counterinsurgency gurus in Washington, a senior advisor to generals and officials in both the Bush and Obama administrations and a prolific author and speaker on the U.S.-led mission in Afghanistan.

So his announcement to a private, off-the-record meeting of foreign-policy wonks last month that he was quitting his main consulting gig left many in the room scratching their heads.

Kilcullen almost missed his planned appointment to speak with the group that Saturday morning in late January, explaining that he had just spent several hours suddenly resigning from the Crumpton Group, the consulting firm headed by former State Department and CIA official Henry "Hank" Crumpton, over "a matter of principle."

Contacted by The Cable, Kilcullen confirmed his remarks but said he couldn’t discuss the reasons for his split with the Crumpton Group because he had signed a non-disclosure agreement.

"What I can say is that I’m still very heavily involved in work in Afghanistan and in support of foreign assistance, humanitarian work, governance and development worldwide, and have formed my own company to work in that space."

https://en.wikipedia.org/wiki/Henry_A._Crumpton

Henry "Hank" A. Crumpton, (born 1957) was a Central Intelligence Agency operations officer for 24 years, rising to deputy director of the Counterterrorism Center and then heading the CIA's National Resources Division, which focuses on operations in the United States. He was appointed by President George W. Bush as Coordinator for Counterterrorism at the Department of State with the rank of Ambassador-at-Large on August 2, 2005. He is the author of The Art of Intelligence: Lessons from a Life in the CIA's Clandestine Service. He founded and is CEO of the business intelligence firm Crumpton Group LLC.

Crumpton is a Director of Argan Inc. He is also on the advisory boards of The Coca-Cola Company, AECOM, Inc., and DC Capital Partners, a private equity firm. He is a member of the Council on Foreign Relations and an honorary member of the OSS Society.