- with 18 years first orchestral concerts in Vienna Musikverein
- with 22 years 1st Prize - International Conductors Competition in Liverpool 
- with 23 he conducts Verdi “Traviata“ at the Spoleto Festival, Italy (stage director Luchino Visconti)

- there also the European Firstperformance of Samuel Barber piano concerto (John Browning)
- in Rome with the Orchestra della RAI : Bruckner 7
- in Tokyo concerts with Japan Philharmonic
(Brahms 4, Brahms 1, Till Eulenspiegel, Borodin 2, Bartok Dance Suite etc)
- in London concerts with London Philharmonic Orchestra / Royal Festival Hall
(Brahms 1, Beethoven 8, R. Strauss, Kodaly etc.)

- with 24 years conductor at Vienna Volksoper

(R. Strauss Feuersnot, Tiefland, Bartok Bluebeard, Strawinsky Nightingale, Rusalka, Zauberflöte, Ravel l’enfant & l’heure espagnol, Freischütz, Hänsel & Gretel, Pique Dame, Butterfly, Hoffmann, world first performance Salmhofer Dreikönig, Martha, Evangelimann, Lucia d.L., Berlioz Damnation and many others ) 

- with 26 years conductor at Vienna State Opera

(Carmen, Zauberflöte, Boheme, Gounod Faust, Barbiere, Ballo in Maschera and others)

concerts mit London Philharmonic, Hungarian National Orchestra Budapest, New Philharmonia London, Vienna Symphony, Royal Philharmonic London, RAI Torino, RAI Napoli und RAI Roma, Berlin Philharmonic, Chicago Symphony, Orchestre National Paris, Munich Philharmonic, Bayr. Rundfunkorchester
conducts at Frankfurt Opera (Carmen, Pique Dame, Entführung), Cologne Opera (Fidelio), Hamburg State Opera (Rosenkavalier) Munich State Opera (Hoffmann, Forza del Destino) and many others
disc recordings for Decca, BASF, Teldec, Amadeo and Musical Heritage USA

- with 34 Generalmusikdirektor / Musicdirector of the City of Mainz, Germany

guesting with the Mainz Opera in Den Haag (Tannhäuser, Lohengrin) Valencia (Tristan, Lohengrin) and at the
Mallorca Festival (Tristan, Lohengrin, Holländer Tannhäuser)

guestconducting opera performances  and concerts in Zurich, Basel, The Haige, Chicago, Tokyo, Vancouver, Buenos Aires, Budapest, Copenhagen, Santiago/Ch., São Paulo, Venice, Berlin, Munich, Hamburg, Stuttgart, Cologne, Naples, Monte Carlo, Barcelona, Catania, Palermo, Krakau, Lodz, Oslo, Edmonton, Miami, Indianapolis and more

more than 100 operas in his repertory (Mozart, Verdi, Wagner, Puccini, R. Strauss, Berg, Bartók, Strawinsky, Martinu, Zemlinsky, Schreker, Schostakovitsch; Werke von Dallapiccola, Petrassi, Penderecki, Ligeti u.v.a.)

- 1995 - 2000 Guest-Chiefconductor of the Royal Danish Opera Copenhagen.

(Tannhäuser, Tristan, Rosenkavalier, Hamlet, Capriccio, Boheme, Butterfly, Don Giovanni, Arabella, Lohengrin, Ballo in Maschera, Meistersinger, Holländer, Prokofjew Liebe z.d. drei Orangen; Konzerte : 3. Mahler, Weihnachtsoratorium etc
- guesting with the Royal Danish Opera at the Royal Opera House Covent Garden London
Prokofjew The Love For Three Oranges

conducted at the Festivals Salzburg, Wien, Chicago, Spoleto, Libramont, Budapest, C. de Jordao, Settembre Musica Torino,
Dalhalla Sweden, Bregenz Festival 2002, 2005, Glyndebourne Festival 1996, 1999 and 2005
CD recordings, many TV and Radio performances
Premieres/performances since 1994 among many others:

- Meistersinger - Marseille
- Butterfly - Vienna State Opera
- Perlenfischer - Leeds und Manchester
- Don Giovanni  - Royal Opera House Covent Garden, London
- Tannhäuser - Vienna State Opera
- Idomeneo - Pretoria, South Africa
- Hänsel & Gretel – Vienna Volksoper
- Arabella - Glyndebourne Festival, London Philharmonic Orchestra
- Meistersinger - Torino (ROH Covent Garden Production)
- Holländer - Houston Grand Opera (Radio-Broadcast over all USA)
- Così fan tutte - Royal Opera House Covent Garden, London
- Bruckner 9 – Brussels & Antwerp
- Rosenkavalier - Vienna State Opera
- Boris Godunov - Torino
- Lustige Witwe - Royal Opera House Covent Garden, London
- Holländer - Deutsche Oper Berlin
- Manon Lescaut - Glyndebourne Festival, London Philharmonic Orchestra
- Fidelio - Vienna State Opera
- Iolanta (Tschaikovsky) & Suor Angelica (Puccini) - Teatro San Carlo Naples
- Salome - Hamburgische State Opera
- Tristan - Genova
- Pagliacci & Puccini G. Schicchi - Vienna State Opera
- Mahler 5 - Bologna
- Bruckner 8 – Leeds and Huddersfield
- Zauberflöte - Vienna State Opera
- Janacek Totenhaus - Strasbourg
- Puccini La Rondine - Leeds and Manchester
- Holländer - Torino
- Tosca - Berliner State Opera „Unter den Linden“
- Verdi Requiem - Royal Philharmonic Orchestra / Royal Albert Hall London
- Rosenkavalier - Leeds and Manchester
- Verdi Requiem - Stockholm
- Mozart Requiem – Stockholm
- Lohengrin - Oslo
- Hänsel & Gretel – Dallas Opera USA
- Tote Stadt - Stockholm
- Verkaufte Braut - Stockholm
- Julietta (Martinu) - Bregenz Festival 2002 (CD recording)
- Tristan - English National Opera 2003
- Figaro – Strasbourg 2004
- Bruckner 7  and Hindemith "Mathis der Maler"  - Tschaikowsky Symphony Orchestra Moskow 2004
- Schreker Irrelohe - Volksoper Vienna 2004
- Frau ohne Schatten - Innsbruck 2004
- Meistersinger – Royal Danish Opera, Copenhagen 2004
- Salome (in concert) - Orchestra d. Accademia Naz. d. Santa Cecilia, Rome 2004
- Verkaufte Braut - Glyndebourne Festival 2005, London Philharmonic Orchestra
- Johann Strauss Der Lustige Krieg - Bregenz Festival 2005
- Meistersinger and Freischütz Innsbruck 2005/06
- Mahler 1 – Torino 2005
- Cosi fan tutte - Strasbourg 2006
- Carneval concert of the Vienna Symphony Orchestra – Musikverein Vienna 2006
- Clemenza d. Tito - Volksoper Vienna 2006
- Bruckner 8, Mahler 3, Mahler 2  - Innsbruck 2005 - 2007
- Rosenkavalier - Oslo 2006
- Debussy Pelléas et Mélisande and  Ariadne auf Naxos - Innsbruck 2007
- Ravel l’heure espagnol & Orff Die Kluge - Volksoper Vienna 2007
- Bruckner 7 - Orchestra d. Accademia Naz. d. Santa Cecilia, Rome
- Freischütz – in Bregenz Festspielhaus 2008, Symphonieorchester Vorarlberg
- Bruckner 8 - Royal Danish Orchestra Kopenhagen 2008
- Flying Dutchman - Staatsoper Stuttgart, December 2008 till March 2009
- Dworak 8th Symphony  -  Symphonieorchester Vorarlberg / Festspielhaus Bregenz, March 2009
- R. Strauss : Ein Heldenleben - Tschaikovsky Symphony Orchestra, Moscow, April 2009
- R. Strauss :  Elektra (in concerts ) Orchestra Sinfonica Siciliana, Palermo, May 2009
and many others

As a composer Dietfried Bernet is published with one piece at Universal Edition, for Bärenreiter Publishers he translated together with Ales Brezina the Czech opera “Juliette” by Martinu into German and is author of the successful book :
“Argumente für den Herrn im Frack / What You Always Wanted To Know About Conducting ..”