As a manager, Riedl has coached Olympique Khouribga (Morocco, 1993–94), Al-Zamalek (Egypt, 1994–95), Al Salmiya (Kuwait, 2001–03), and many national teams, including Austria (1990–92), Liechtenstein (1997–98), Palestine (2004–05), Vietnam (1998–2001, 2003–04, 2005–2007), and Laos.