(written from a Production point of view)
TRW Space and Defense Park, now part of Northrop Grumman (Aerospace Systems), was located at One Space Park Drive in Redondo Beach, California.
On 15 February 1967, several scenes on the Deneva colony from the Star Trek: The Original Series first season episode "Operation -- Annihilate!" were shot at TRW Space and Defense Park under the walkway near the cafeteria. 
TRW was also considered as a location for the Star Trek: Voyager episode "Future's End" and its sequel, but no suitable place was found where the crew was allowed to shoot. ("Red Alert: Amazing Visual Effects", VOY Season 3 DVD special feature)