M. Reilly was a member of Starfleet in the 22nd century.
In January of 2155, Reilly worked in Instrumentation and Control at the Fleet Operations Center on Earth. Reilly's office was located in room 1331. (ENT: "Demons" set artwork)
Reilly's name was seen on directory listings seen on the set of "Demons".
M. Reilly was named after Enterprise Steadicam assistant Mark Reilly.