Roger Voss

Roger Voss was a member of the Operation Nightfall strike team in Findings at CTU. He was later retconned with the publication of the Nightfall comics.

Findings at CTU
In The House Special Subcommittee's Findings at CTU, it is mentioned that Voss was a member of the Operation Nightfall strike team that invaded the Drazen Compound in Kosovo to take out warlord Victor Drazen. He was the Air Force Special Operations combat controller.

The appearance of Voss, as well as Jack's other operatives and certain events in the Nightfall mission as mentioned in Findings, were all retconned with the publication of the Nightfall comics, which featured a different set of strike team members and events.