Schaefer has reportedly demanded Esteghlal’s officials to hire his compatriot as his assistant.
Schrodinger has worked as goalkeeping coach of TSG Pfeddersheim.
Schrodinger has already coached the Esteghlal keepers in March.
The appointment of the German coach will be assessed by Esteghlal technical committee.
Esteghlal sits eight in Iran Professional League (IPL) table, 11 points adrift of leader Padideh.