“Like I always say, 'You can NEVER have too many guns.'” Original Squad Members Gerard Keller: The Leader
However, Commander Gerard Keller instead had other plans for the team's purpose: to find and kill Captain Jonathan Allen, against whom Gerard held a personal vendetta. Officially, Omega Squad was created to serve as a black operations team for the Citadel Council, effectively the human version of groups like the turian Blackwatch or the Council Spectres. In 2178, the Systems Alliance wanted 'a squad that can handle any mission or enemy and eliminate any threat to the Alliance or the Council with effective, absolute lethality and dedication'.
Omega Squad was formed by Gerard Keller to be a team capable of taking on any threat at any time.