Jacob Taylor

Jacob Taylor  is a human biotic and a former Alliance Marine under the command of Major Derek Izunami. He resigned after surviving the geth attack on Eden Prime. He is also part of Commander Shepard's squad during the suicide mission.

Jacob is a highly experienced fighter, and is skilled in the use of weapons and biotics. He works professionally alongside Miranda Lawson, who functions as his informant and later as his superior officer.

History
Jacob was born in 2157 and eventually joined the Alliance military. Originally Jacob was part of an Alliance-sponsored group called the Corsairs, a program that contracted independent starship captains to handle missions that fell outside of official Alliance jurisdiction, giving the Alliance plausible deniability. Jacob eventually left the Corsairs and was assigned to Eden Prime, and was present for the geth attack that nearly destroyed the colony. After Eden Prime, and later the geth attack on the Citadel, Jacob became disillusioned with the ineffectual bureaucracy of the politicians and quit the Alliance after five years of service. Later that year, after his collaboration with Miranda Lawson to protect the council against a terrorist threat, Jacob enlisted with Cerberus for a chance to serve humanity without too much to hold him back, although he remains cautious of some of the organization's more ruthless measures.

Shortly after the destruction of the first Normandy, Miranda hires Jacob as her 'lieutenant' in the Lazarus Cell, whose titular Lazarus Project is tasked with resurrecting Commander Shepard. Over the next two years, while work on Shepard continues, Jacob is technically in charge of security on the Lazarus Research Station. At this time it is implied he and Miranda had some form of relationship, although it didn't work out; Jacob claims he wasn't the right person for Miranda, though they remain effective colleagues.