 His principal appointments were as Music Director and Conductor of the Malmö Symphony Orchestra (1966–69) in Sweden, the Australian Broadcasting Commission Orchestras (1967–69, Sydney and Melbourne; 1975–79, Perth), the San Diego Symphony and La Jolla Chamber Orchestra (1971–1980), and the Aalborg Symphony Orchestra (1982–89) in Denmark.As a guest conductor, Peter Erős appeared regularly with major symphony orchestras and opera companies on five continents, including the Chicago Symphony Orchestra, Cleveland Orchestra, Orquestra Sinfônica Brasileira, National Symphony Orchestra, Seattle Symphony Orchestra, San Francisco Symphony, Israel Philharmonic Orchestra, Royal Philharmonic Orchestra, Royal Liverpool Philharmonic Orchestra, Philharmoniker Hamburg, Stockholm Philharmonic Orchestra, Royal Swedish Opera in Stockholm, Hamburg State Opera, the Hague Residentie Orchestra, and the Scottish National Orchestra, and made nine tours of South Africa.He received ASCAP awards in 1983 and 1985 for his programming of music by American composers.