02/14/2022 03:21:00 PMObituaryDonLouisKnightstep'70AlumniobituaryAlumni Don Louis Knightstep (’70) Plano. Over his 35-year career at Texas Instruments, Don held multiple managerial positions and retired in 2002 as the producibility and fabrication manager. Don married his college sweetheart, Stacy Lee Underwood (’65), in Dallas in 1965.