https://www.pinterest.com/masamunedsato/
Pretty sure that's him

To summarize:

Carlton Masamune Washburn
310 Leisurewoods Dr, Buda TX 78610-2418
Landline: (512) 295-2086
Studied at the Univesity of Texas at Austin and worked at the Texas Memorial Museum of Science & History (unsure if he still is in either or what he does now)

Pretty sure the address is where his parents live, so he could have moved by now