For the mirror universe counterpart, please see R. Johnson (mirror).
R. Johnson was a Starfleet officer in the 23rd century.
Johnson was listed as a member of the Research and Development team on the dedication plaques of the USS Shenzhou and the USS Discovery. (DIS: "The Vulcan Hello", dedication plaque; DIS: "Context Is for Kings", dedication plaque)
Johnson was listed as a Starfleet Command officer on the dedication plaque of the USS Enterprise and the USS Farragut. (DIS: "Such Sweet Sorrow"; SNW: "Strange New Worlds", "A Quality of Mercy")
This character was only mentioned in writing.
This officer was named after Robyn Johnson, who was an assistant to Alex Kurtzman. She was later promoted to associate producer.