Born in Vienna Alexandra Rivas studied Singing at the State Conservatory of her home town with Yevgeny Nesterenko, amongst others, attending operetta master classes under the direction of Lucia Meschwitz.

As a recitalist and concert artist she appeared in the Great Hall of the Wiener Konzerthaus in a concert performance of  Aleko by S. Rachmaninov under the guidance of Alexander Lazarev, sang G. Mahler’s Kindertotenlieder with the Radio Symphony Orchestra in the Golden Hall of the Wiener Musikverein and appeared in a concert performance of Parsifal led by Dennis Russel Davies at the Brucknerhaus in Linz. She sang W.A.Mozart’s Requiem for the Opera House of Palma de Mallorca and G.F.Haendel’s The Messiah at the Auditorio de Castellón in Spain, a country where she has offered recitals in cities like Barcelona, Santiago de Compostela, Lugo, Avilés, Gijón and Murcia. In Moscow the mezzo was conducted by Maestro Vladimir Fedoseev performing Beethoven’s 9th Symphony opposite Robert Holl with the Tchaikovsky Radio Symphony Orchestra in the Great Hall of the Moscow Conservatory.

Since 1995 Alexandra Rivas has been engaged by many Opera Houses throughout Spain like Teatro Campoamor in Oviedo where she interpreted with great success, amongst many other roles, Stephanoin Ch.Gounod’s Roméo et Juliette opposite Rolando Villazón, Beppe in P.Mascagni’s L’Amico Fritz with Miriam Gauci and José Bros, “Olga” in P. Tchaikovsky’s Yevgeny Onegin opposite Carlos Álvarez and Kaludi Kaludov, “Siebelin Ch. Gounod’s Faust, “Mallika” in L. Delibes’ Lakmé with Desirée Rancatore and Cherubino in W. A. Mozart’s Le Nozze di Figaro with Manuel Lanza.

In France the mezzo was engaged as “Cherubino” in Le Nozze di Figaro and “Dorabella” in Cosí fan tutte as well as “Gymnasiast” in A.Berg’s Lulu at the theatre of Metz.

She appeared opposite Carlos Álvarez again as “Filipevna” in Yevgeny Onegin as well as “Enriquetta” in V.Bellini’s I Puritani at the Teatro Cervantes in Málaga, as “Siebel” in Faust and “Larina” in Yevgeny Onegin at the Opera Festival of La Coruña and again in I Puritani and Carmen at the Palacio de Festivales in Santander.

In Madrid she sang “2nd Magd” in R. Strauss’s Elektra at the Teatro Real and interpreted the roles of “Fortuna”, “Pallade” and “Venere” in C. Monteverdi’s L’Incoronazione di Poppea at the Teatro de la Zarzuela under the baton of Maestro Alberto Zedda.

At the Teatro de la Maestranza in Sevilla the Austrian mezzo appeared as “Vicomte Jean de Morcerf” in J. Massenet’s Le Portrait de Manon and sang the leading role in E. Humperdinck’s Hänsel und Gretel as well asRoggiero in G.Rossini’s Tancredi opposite Daniela Barcellona, Mariella Devia and Gregory Kunde under the baton of Maurizio Benini.

At the Palacio Euskalduna in Bilbao Alexandra Rivas interpreted the role of “Bersi” opposite Daniela Dessí and Fabio Armiliato in U.Giordano’s Andrea Chénier led by Renato Palumbo and appeared there again in A. Dvorak’s Rusalka as well as in O.Respighi’s La Bella Dormente nel Bosco, in W.A. Mozart’s Die Zauberflöte ("2nd Dame") , with Jean-Christophe Spinosi conducting, in R.Strauss’ Ariadne auf Naxos and in the role of Siebelin Ch. Gounod’s Faust opposite Pjotr Beczala and Eva Mei.

Great Arena Productions of Carmen and La Traviata led her to the Netherlands, Germany (Munich, Hamburg), Switzerland (Zürich) and China (Shanghai).

At the Teatro Villamarta in Jerez de la Frontera she interpreted the role of Stephanoin Romeó et Juliette, at the Auditorio Baluarte in Pamplona she sang Siebel in Ch. Gounod’s Faust again and at the Theatre of the Universidad Laboral in Gijón she was “Suzuki” in G.Puccini’s Madama Butterfly opposite Hiromi Omura and Massimiliano Pisapia.

At the Opera Festival of La Coruña she sang "Hedwige" in a concert performance of G.Rossini's Guillaume Tell opposite Gregory Kunde and Marc Stone, led by Alberto Zedda.

The Teatro de la Maestranza in Sevilla invited Alexandra Rivas again to sing "Wellgunde" in R.Wagner's Das Rheingold and "Waltraute" in R.Wagner's Walküre in productions of La Fura dels Baus. At the Auditorio Baluarte in Pamplona she interpreted the role of "Maddalena" in G.Verdi's Rigoletto opposite Carlos Almaguer, Sabina Puértolas and Antonio Gandía.

In a concert performance of G.Verdi's Nabucco at the Festival de Ópera de La Coruña the mezzosoprano sang "Fenena"opposite Leo Nucci, Elisabete Matos and Luiz-Ottavio Faria under the baton of Keri-Lynn Wilson and at the Teatro de la Maestranza in Sevilla she interpreted the role of "Lola" in P.Mascagni's Cavalleria Rusticana opposite Dolora Zajick.