Complex sentence: He then spent a number of years as Athletic Manager and Coach at Haskell Indian Institute in Kansas, and later worked as a YMCA Director, and retired in 1946 as Athletic Director at the Kansas City Athletic Club.
Split into simpler sentences: He then spent a number of years as Athletic Manager and Coach at Haskell Indian Institute in Kansas, and later worked as a YMCA Director. He retired in 1946 as Athletic Director at the Kansas City Athletic Club.