Simplify the following text for a Grade 6 native English-speaking person.
Original: Robinson then accepted an offer from his old friend and pastor Rev. Karl Downs to be the athletic director at Sam Huston College in Austin , then of the Southwestern Athletic Conference .
Simplified: Robinson then took an offer from his old friend and pastor Rev. Karl Downs to be the athletic director at Sam Huston College in Austin . The school was part of the Southwestern Athletic Conference at the time .