Jack Bauer employer Central Intelligence Agency
Characterization
Jack Bauer was born in Santa Monica, California, on February 18, 1966, to Phillip Bauer, who placed his livelihood in his company, BXJ Technologies. The name of Jack's mother is unknown. Jack had one brother, Graem Bauer. Phillip originally planned to give the company to Jack, but as Jack said in Day 6, "I just had to go my own way."Jack has a Bachelor of Arts degree in English Literature from the University of California, Los Angeles and a Master of Science degree in Criminology and Law from the University of California, Berkeley. He enlisted in the United States Army and later graduated from Officer Candidate School. His branch was infantry. He first served in the Special Forces, and was later a member of the 1st Special Forces Operational Detachment-Delta (1st SFOD-D), popularly known as Delta Force. Among his awards and decorations are the Silver Star, the Purple Heart, and the Legion of Merit. Apart from Special Forces and Delta training, he received Airborne, Air Assault, and Ranger training. He left the Army with the rank of Captain after twelve years of service.
While in the Army, he married Teri Bauer and had one child, Kim Bauer. Following his military career, Jack worked for both the Los Angeles Police Department's Special Weapons and Tactics unit and for the Central Intelligence Agency (CIA) as a Case Officer in the National Clandestine Service. He was recruited into the Counter Terrorist Unit (CTU) by Christopher Henderson, CTU's Director of Field Operations.Bauer has shown a high proficiency with firearms (typically using a SIG P228 as his weapon of choice for the first and second seasons, then switching to a USP Compact, until after Season 8 he switches again, this time to a P30).  He also can handle explosives and electronic devices, and has a high resistance to torture (after being kidnapped by Chinese agents and tortured for almost two years, it is revealed he didn't speak a single word the whole time). He is fluent in German (Season 8) and has demonstrated some ability to either speak or understand Spanish (Seasons 1 and 3), Serbian (Season 1), Russian (Season 6), and Arabic (Season 8). He is also shown to be capable of flying planes (Season 2) and helicopters (Seasons 3, 5, 8, and 9).  Jack is a formidable hand-to-hand combatant from his years in the Army and as a federal agent, and he has killed multiple enemies in hand-to-hand combat.
Bauer generally wishes to live a humble life, but is willing to step forward and protect his country, even at the expense of his own health. His involvement throughout the show had caused him to lose many of his loved ones, despite his leadership and own calls. While the government acknowledges his service, Bauer and his superiors clash over his more rogue and extreme actions he takes without explicit authorization. 
Jack has lost his wife Teri, murdered by a traitor who had infiltrated CTU. His relationship with his daughter Kim is at times tumultuous (Season 2, Season 5) while at other times accepting of who he is and what he must do (Season 7, Season 8). In his goal to find peace, he gets involved with Audrey Raines, the daughter of United States Secretary of Defense James Heller, whom Jack works for. The relationship with the Secretary's daughter is all but severed when Jack makes the decision to save a material witness over Audrey's ex-husband. He lost his best friend, Tony Almeida, and former boss, Michelle, to a car bomb. He lost his friend, former President David Palmer, to the same assassin who killed his friends. His girlfriend \ Renee Walker was killed by an assassin's bullet. His own government that he has sworn to protect has turned on him (former President Logan, President Taylor), and at the beginning of Season 7 he is on trial for his interrogation tactics. Finally, the friend he thought was dead (Tony Almeida), betrays him when he turns to terrorism in order to seek revenge against the person who killed his wife, Michelle.
Jack's final dialogue with FBI Special Agent Renee Walker in Season 7 offers insight into his perspective on torture and its ramifications:
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