Complex sentence: Devi continued her work at the JNM Dance Academy where she rose in ranks to become the Head of the Department of Folk and Community Dance in 1966 and held the post of the vice principal of the Academy at the time of her retirement in 1985.
Split into simpler sentences: Devi continued her work at the JNM Dance Academy where she rose in ranks to become the Head of the Department of Folk and Community Dance in 1966. She held the ost of the vide principal of the Academy at the time of her retirement in 1985.