P. Jacobson was a member of Starfleet in the 22nd century.
In January of 2155, Jacobson worked in Ops Planning at the Fleet Operations Center on Earth. Jacobson's office was located in room 1358. (ENT: "Demons" set artwork)
Jacobson's name was seen on directory listings seen on the set of "Demons".
P. Jacobson was named after Enterprise lamp operator Phil Jacobson.