Jack did a brief stint at the (then) Georgetown University Center for Strategic and International Studies, then accepted a teaching position at the U.S.Naval Academy, Annapolis, MD.

• 杰克在乔治敦大学国际战略研讨中心写了一篇摘要，然后被在美国马里兰州首府安纳波利斯的美国海军军官学校聘请为教师。