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Our People

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David F. Lasseter 

David F. Lasseter provides consulting and advising solutions to clients specializing in national security, law enforcement, intelligence, and biotechnology.

Prior to HGS, David was the Deputy Assistant Secretary of Defense for Policy responsible for, among other issues, all strategies and policies concerning preventing the proliferation of WMD and WMD-related materials; the United States Department of Defense (DoD) Cooperative Threat Reduction Program; and Chemical, Biological, Radiological and Nuclear (CBRN) defense.

In this role he also oversaw Oceans and Airspace Policy for DoD, supporting global mobility of U.S. forces.  Before this role he served as the Deputy Assistant Attorney General for Legislative Affairs at the United States Department of Justice with responsibility for the national security portfolio. Prior to DOJ David worked for United Technologies Corporation as the lead defense government relations professional. David has served as a Congressional chief of staff,  military legislative assistant, and counsel.


He is also a Marine Corps intelligence officer in the reserve component. David received his undergraduate degree from the University of Georgia and a juris doctor from the University of Alabama.  He has attended numerous DoD schools.


Julie Zelnick Lasseter

Julie Zelnick Lasseter is a Managing Director at Horizons Global Solutions, LLC. She provides consulting and advising solutions to clients and specializes in multi-sector policy and appropriations federal strategies. Julie has also worked at the local, state, and federal level of American politics and has a keen understanding of political and policy trends and a deep understanding of the intersection of economics, policy, and political implications of decisions made by the private and public sectors. Julie is adept at using this knowledge to help clients navigate government and reputational risk.

Prior to Horizons Global Solutions, Julie worked as a policy and development Director for an international nonprofit advising C-Suite executives on navigating government on economic development, carbon markets, sustainability, and agriculture, as well as working to raise private funds for projects. Before that, Julie served at the Pentagon in the Obama Administration as a Special Advisor in the Office of the Secretary of Defense and for the Assistant Secretary on Energy, Installations, and Environment. Julie also served as a senior Legislative Advisor to Senator Mark Pryor (D-AR), Chair of the Appropriations Subcommittee on Agriculture, where she handled his entire Appropriations Committee and national security portfolio. Prior to the Senate, Julie served as a national security advisor to Representative Derek Kilmer (D-WA) and Representative Vic Snyder (D-AR), both Members of the House Armed Services Committee. Julie has also worked for a think-tank advising on the federal budget, as well as numerous political campaigns.

Julie received her undergraduate degree from The George Washington University and a Masters of Business Administration from The Darden School at the University of Virginia.