Growing up on Omega, Whitson seems very confident of his abilities in a fight and wants to sign up with the mercs despite his youth and inexperience, even purchasing a 50-credit M-4 Shuriken for the job. When he makes his way to Afterlife to sign up, he happens to be next in line to a heavily-armed squad: Commander Shepard's team has just signed on to help the mercs "take down" Archangel. Shepard notes his appearance, but Whitson claims he can take care of himself. The Commander can forcefully dissuade him from signing up.
Should Shepard allow him to join with the mercs, he arrives at the mercenary staging ground around the same time Shepard's crew does, preempting Salkie's meet and greet with Shepard's team. He salutes the batarian after receiving directions to Sergeant Cathka before speeding off. Later, Whitson becomes Archangel's first casualty during the assault on the vigilante's base.
If Shepard breaks Whitson's weapon, he is prevented from participating and is spared from the skirmish. He later sends the Commander an email, titled "Glad I Didn't Sign Up!", identifying himself and expressing utmost gratitude.
- If Whitson was prevented from signing up but Shepard returns to the Normandy SR-2 before finishing the mission, the e-mail from Whitson can be obtained and read prematurely there.