Alan Jonathan "AJ" Taylor was born in Christopher's Landing, Titan in the year 2347. His mother, Tula Sajis, was Titan's colonial governor and his father was Captain Garret Taylor of the USS Stewart. Due to his parents careers, he rarely saw them, and was mainly raised by his father's best friend, former Federation Ambassador Jonathan Garrick.
A de facto member of the Garrick household, AJ developed a close bond with Jonathan's sons, especially the youngest, Robert. The two would often sneak out of the house to play Parisis squares or go rock-climbing in the nearby mountains. Taylor would later reflect that he enjoyed the activities because his mother would not have approved.
Alan entered Starfleet Academy in 2364, majoring in sciences. While at the Academy, he became friends with Cadet Tom Decker, and became part of Nova Squadron. Both Taylor and Decker left Nova Squad when Nick Locarno proposed to perform the Kolvoord Starburst during their flight trials.
Shortly thereafter, he accepted an assignment on the USS Hunter. After the death of the Hunter's science officer during the battle with The Entity, Taylor was promoted to Lieutenant junior grade and became the ship's chief science officer.
- According to his personnel file, Taylor had a photographic memory and was able to block some telepathic probes by mentally reciting technobabble.
- He brought a Golden Retriever named Dusty with him aboard the Hunter. He was also a self-professed chocoholic.