I recently received an email from John (Tien-Cheng Kiang), who was an air traffic controller in Taipei. He worked alongside several American controllers until the U.S. departure from Taiwan in 1979. He continued working for the ROC Civil Aeronautics Administration until his retirement in 2006 - a career spanning more than forty years. His supervisor toward the end of the American presence was a Major Aschenbrenner, who was assigned to J-3 at the U.S. Taiwan Defense Command.
John has been trying to locate his former boss but has been unable to do so. I told him that I would publicize his request here, as well as on the USTDC Group website, which I have already done.
If you remember Major Aschenbrenner, or have any idea where he is today, please comment below. I have had very little success contacting any of the people that I knew in Taipei so I'm always happy to lend a hand to others who are trying to do the same thing.