Complex sentence: They moved to Dallas, Texas to pursue business and professional opportunities in 1985 where they ultimately founded T&S Software (Telephony & Speech) in 1995, working closely together until Thayer's untimely death in 2005.
Split into simpler sentences: They moved to Dallas, Texas to pursue business and professional opportunities in 1985. They ultimately founded T&S Software (Telephony & Speech) in 1995, working closely together until Thayer's death in 2005.