- “Man, this is screwed up nine ways from Sunday.”
- — Roger Miller.
Working as a city engineer, Roger got to know the Dailey family well, going on camping trips with them, and even attending Amy Dailey's graduation. He lost touch with Trish after her father "got transfered up state".
Post-BlastEditTrish contacts Cole MacGrath and asks him to locate Roger; she is hoping that the engineer will be able to fix the Stone Canal Bridge that links the Neon and Warren districts.
Cole tracks Roger to Valentine Park, where he is being held by two Dust Men. After quickly defeating Roger's captors, Cole explains that he was sent by Trish and that "she's hoping you can fix the stone canal drawbridge." Whilst repairing the bridge, Roger speaks of the time he spent with Trish and her family, how he is saddened that Trish was also stuck in the quarantine and asks if Amy had made it out. Unaware that Cole's reassurance that Amy did make it out was a lie, Roger adds that he'd "hate to see both those girls stuck in here." Roger (with the assistance of Cole and Lou) successfully repairs the bridge, allowing Trish to access the medical supplies in Bayview Hospital.
Later, Roger rigs electrical equipment to a city bus so Cole can protect Trish's medical supplies while they travel to the hospital.
Near the end of the game, John White informs Cole that a couple of engineers had setup Induction Grind wires on the destroyed bridge between the Historic District and the Neon District. It is possible that the engineers were Roger and Lou.
- It is possible to kill Roger after the mission "An Old Friend," however even if the player kills him, Trish later mentions him, noting he helped rig up the bus with electricity.
- During the mission "Against the World," Roger can be seen among other civilians attacking each other and Cole due to the toxin coming from the air-balloons.
- It is possible that this character is himself a reference to the Yardbirds album "Roger the Engineer." This has not been confirmed however.