From This Might Be A Wiki
Greg Thompson is the chief sound engineer at Kampo Studios in Greenwich Village. He was an engineer on Factory Showroom, the bonus tracks on Mink Car, Dial-A-Song: 20 Years Of They Might Be Giants, A User's Guide to They Might Be Giants, The Else and Here Comes Science and did engineering and mixing on Here Come the 123s. He was also involved in the production of Join Us.
In addition to his involvement with TMBG, Thompson has worked with numerous other artists and has done significant sound work on ABC's Good Morning America. His complete discography is available here.