Schäfer joined the SS in 1933, and became the head of the SS training system and in 1934 was a teacher in the SS sports school at Fürth and later at Reutlingen.
Schäfer joined the Waffen-SS in 1933, and became the head of the SS training system. In 1934, he was a teacher in the SS sports school at Fürth and later at Reutlingen.