The original Old Series Ships - Franz Joseph
According to the Star Trek: The Next Generation Technical Manual, starship design is handled by the Advanced Starship Design Bureau.
Mr. Scott's Guide to the Enterprise mentions Leeding Engines Ltd. as the designer of the movie era Constitution-class refit warp engines. It also says, Kloratis Drives built the new impulse engines. TrekFan1984 Ends (talk) 01:07, March 12, 2015 (UTC)