He was previously Vice Chairman and Board Member at Tilman & Company, a predecessor to Agilion[3][4] General Jacoby is a leading expert on modern warfare, strategic planning, and international security, as well as an accomplished writer and historian.

He is a co-author of Agility: How to Navigate the Unknown and Seize Opportunity in a World of Disruption (Missionday, 2019),[5] having also published studies on air campaigns, brigade combat teams, ballistic missile defense, and strategic deterrence.

He is past Distinguished Chair of the Modern War Institute at the United States Military Academy at West Point and member of the Council on Foreign Relations.

Previously, he served as Director of Strategy, Plans, and Policy for the Joint Staff, contributed to the Middle East peace process, and represented the U.S. military at the United Nations.

As the first Army officer to lead NORAD, he reorganized its 1,800-person bi-national and joint headquarters and integrated 35 federal, state, and non-governmental organizations for the defense and security of North America.