1980 | 1990 From the Alps to the Oil Fields - Consolidating my Repertoire
- 1981 - Named Principal Guest Conductor of the London Philharmonic Orchestra
- September 1981 - Assumes post of Principal Guest Conductor of the Tonhalle Orchestra in Zurich (Switzerland)
- September 1982 - Assumes post of Chief Conductor & Artistic Director of the Tonhalle Orchestra through 1986
- September 1988 - Assumes post of Music Director of the Houston Symphony (Texas, USA) remaining there for eleven years

