Armstrong Armstrong was a Starfleet security officer stationed aboard the and under Captain Jean - Luc Picard in 2367 through 2373 . Throughout his time on both ships , he held the rank of ensign . Service history . 2367 . Armstrong was working on the bridge manning an aft station when the " Enterprise " - D encountered a spaceborne entity and had to struggle with its descendant . ( ) 2368 . Armstrong had a background in medicine and was among the crewmembers of the " Enterprise " - D who assisted Dr . Beverly Crusher treating the wounded colonists and crewmembers from the in one of the cargo bay s . ( ) Armstrong , in a command - red uniform , passed Ro Laren after the transporter accident aboard the Romulan science vessel near a turbolift . ( ) Also in a command - red uniform , he passed William Riker and Deanna Troi on their way to the turbolift to the bridge . ( ) 2369 . Armstrong passed a frightened Reginald Barclay , who left the transporter room because of his transporter phobia . ( ) Armstrong , in a command - red uniform , was chatting to another crewmember in front of Ten Forward when the ship was on its way to Rekag - Seronia . ( ) He passed Commander Riker in front of the medical laboratory after Riker talked to Amanda Rogers . ( ) He left a turbolift with a female crewmember when Captain Picard " returned " from his alternate timeline experience , caused by Q and his near death experiences . ( ) Armstrong was among the crewmembers who were evacuated to the Remmler Array in 2369 because of the planned baryon sweep . He passed Captain Picard in a corridor . ( ) He served as relief tactical officer on the bridge during the night shift and received orders from Commander Riker later . ( ) He had a drink in Ten Forward when Beverly Crusher brought Guinan a gift , an ergonomic tennis racket . ( ) 2370 . Armstrong was part of the team searching for Data on a Borg planet in the Delta Quadrant . Armstrong and others were ordered to beam back to the ship by Commander Riker , while Riker himself and Worf stayed behind . ( ) He passed Counselor Deanna Troi and Ambassador Loquel in a corridor ( ) and Troi and her mother Lwaxana near a turbolift . ( ) He passed Commander Riker , Captain Picard , and Doctor Crusher in a corridor after the two latter officers returned to the " Enterprise " - D . ( ) Armstrong later delivered the new directives from the Federation Council , to Picard in the observation lounge , which declared that all Federation vessels will be limited to a speed of warp 5 , except in cases of extreme emergency . ( ) He served on an aft station of the bridge while Juliana Tainer and Pran Tainer were on board . ( ) When Counselor Deanna Troi entered the quarters of Lieutenant Worf , Armstrong passed her . He also shared a drink with a science officer in Ten Forward . ( ) In 2370 , Ensign Armstrong was treated in sickbay but was left by Doctor Crusher when Commander Riker needed her help . Later he served as brig guard for Commander Riker , after he was imprisoned . ( ) He also visited Ten Forward in the same time . ( ) He passed Captain Picard and Ensign Sito Jaxa , who guarded sickbay and later on his way to play poker in the senior officer group . ( ) Armstrong accompanied Diana Giddings , Russell , and Alfonse Pacelli to the Maranga IV outpost and watched a play at the Kot ' baval Festival . ( ) Captain Picard passed Ensign Armstrong and another female engineer in a corridor in 2370 after he returned to the " Enterprise " - D , followed by his time shifts . ( ) 2371 . In 2371 , he had a drink in Ten Forward when Dr . Tolian Soran spoke to Captain Picard . He was later working in engineering when the " Enterprise " - D was attacked by Lursa and B ' Etor . After the battle , he managed to escape from engineering when the magnetic interlock s ruptured and the isolation door began to close . After the " Enterprise " s secondary hull exploded in the resulting warp core breach and the saucer section crashed on Veridian III , Armstrong was among the officers recovering salvagable items from one of the ship ' s cargo bays . ( ) 2373 . Armstrong later served as the tactical officer aboard the in 2373 . He also worked at the operations console when Data wasn ' t available , and later as security officer guarding the jefferies tube access hatch to the bridge . Like all officers aboard the " Enterprise " - E he left the ship with one of the escape pods when Captain Picard ordered to evacuate the ship and started the auto - destruct sequence . ( ) Appendices . Background information . Armstrong was played by regular background actor and LeVar Burton ' s stand - in David Keith Anderson who also played Ashmore on and served as stand - in for Anthony Montgomery on . While Armstrong was referred to by name by Riker in , Anderson did not receive any on - screen credit for his appearances .