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David Grannis

Principal Deputy Under Secretary for Intelligence & Analysis

David Grannis is the Principal Deputy Under Secretary for Intelligence and Analysis in the Office of Intelligence and Analysis (I&A) at the Department of Homeland Security (DHS).  In that capacity, he advises and assists the Under Secretary for Intelligence and Analysis and manages the Office’s day-to-day intelligence operations, including analysis, collection, counter-intelligence, and information sharing missions.  He also serves as the Deputy Chief Intelligence Officer for DHS.

Prior to joining DHS, Mr. Grannis served as the Staff Director of the U.S. Senate Select Committee on Intelligence (SSCI) from 2009 through 2014 and as the Minority Staff Director for 2015.  During this time, he served as the principal intelligence advisor to SSCI Chairman Dianne Feinstein and SSCI Members and led the Committee’s efforts to produce and enact annual Intelligence Authorization Act from 2010 through 2016 and the Cybersecurity Act of 2015.  Mr. Grannis led the production and Committee approval and publication of oversight reports on the CIA Detention and Interrogation Program, the attacks on U.S. facilities in Benghazi, Libya (September 11-12, 2012), and the attempted terrorist attack on Northwest Airlines Flight 253 (December 25, 2009). 

He previously served as a staff designee to Senator Feinstein on the SSCI from 2005 until 2009 with a varied portfolio of committee responsibilities.  Mr. Grannis worked on the House Select Committee on Homeland Security with responsibilities for intelligence, aviation security, and science and technology from 2003 to 2005 and was Senior Policy Advisor to Representative Jane Harman on matters of national security from 2001 to 2003. 

Mr. Grannis was a Research Assistant at the National Academies’ Board on Chemical Sciences and Technology from 1997 to 1999.  He has a Master’s of Public Policy from the Kennedy School of Government at Harvard University with a focus in international security and a Bachelor’s in Chemistry from Cornell University. 


Last Updated: 09/21/2018
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