Joint Terminal Attack Controller (JTAC) is the term used in the United States Armed Forces and some other military forces for a qualified service member who directs the action of military aircraft engaged in close air support and other offensive air operations from a forward position. The term that is used in most other countries, as well as previously in the U.S. and in the relevant NATO standard, is Forward Air Controller. The term became effective in the U.S. on September 3, 2003 with the publishing of Joint Publication (JP) 3-09.3 Close Air Support.

In military tactics, close air support (CAS) is defined as aerial warfare actions—often air-to-ground actions such as strafes or airstrikes—by military aircraft against hostile targets in close proximity to friendly forces. A form of fire support, CAS requires detailed integration of each air mission with fire and movement of all forces involved. CAS may be conducted using aerial bombs, glide bombs, missiles, rockets, autocannons, machine guns, and even directed-energy weapons such as lasers.