Referee #4577
Category downgraded on 19 Dec 2025
BIERMANN Detlef
AUT 🇦🇹
20 Mar 1967 ♂
Category III
Category downgraded on 10 Jan 2025
BIERMANN Detlef
AUT 🇦🇹
20 Mar 1967 ♂
Category II
Activity checked on 12 Sep 2024
BIERMANN Detlef
AUT 🇦🇹
20 Mar 1967 ♂
Category I
First checked on 8 Aug 2023
BIERMANN Detlef
AUT 🇦🇹
20 Mar 1967 ♂
Category I
- Active referee
- Inactive referee
- Retired referee
- Status unknown