Not much is known about the early life and history of Alex Keller. Also known by the call sign "Echo 3-1", Alex served in Delta Force before surrendering his former rank and military service history in Special Forces to the CIA's Special Operations Division

Over the next six years at SAD, Alex changed several identities to achieve "delicate" goals wherever he was needed, often acting autonomously, training, advising, and arming allies as interpreters, trackers, and soldiers. Alex appreciated direct contact with local militias, where he could monitor the intentions of both allies and the enemy to advise appropriate actions.

His mission profiles included counterinsurgency, special intelligence, counterterrorism, information warfare, and countering the proliferation of weapons of mass destruction. The tools of his craft were laptops, hand-held machine guns, satellite phones and combat drones equipped with missiles. Alex also led small teams trained to penetrate behind enemy lines and survive in inhospitable conditions in hostile locations.

Throughout 2017, Alex and his teams played a key role in ensuring final victories over emerging terrorist networks. Since SAD is allowed to carry out missions against enemies of the state without consulting the Pentagon or the White House, Echo 3-1 participated in several actions to destroy enemy leadership.