Tymczyszyn became an instructor for the Civilian Pilot Training Corps, teaching college students to fly in anticipation of war.
After graduation, Tymczyszyn joined the Civil Aeronautics Authority (Precursor to the Federal Aviation Administration) and attended the U.S. Air Force Test Pilot School.
Command pilot Tymczyszyn received the first SETP Iven C. Kincheloe Award with James Gannett for flight testing the Boeing 707 and Douglas DC-8.
[9] In 2004, he was posthumously inducted into the Aerospace Walk of Honor, which celebrates test pilots who were associated with Edwards AFB for distinguished aviation careers marked by significant and obvious achievements beyond one specific accomplishment.
[10][11] In 2014 Tymczyszyn was posthumously inducted onto the Flight Path Museum "aviation walk of fame" on Sepulveda Boulevard at the Northeast corner of Los Angeles International Airport.