[1][2] Born in Innsbruck, early on Schweinester was able to gain professional experience as a soprano soloist with the Wilten Boys' Choir trained by Johannes Stecher, at the Tiroler Festspiele Erl [de], as Prince Yamadori in Madama Butterfly in Mumbai, at the Wiener Kammeroper and at the Vienna Festival as Romeo in an opera by Georg Anton Benda with new compositions by Ulrich Krah.
Among others he was Freddy in My Fair Lady, the little boy in Hans Werner Henze's Wundertheater, Wenzel in The Bartered Bride and Pedrillo in Die Entführung aus dem Serail.
[6] In 2014 he started his international career as Brighella in Ariadne auf Naxos at the Royal Opera House Covent Garden in London,[7] and twice as Pedrillo - in a concert performance in the Festspielhaus Baden-Baden and immediately afterwards in the new production of the Opéra Garnier in Paris.
The German production included Diana Damrau and Rolando Villazón and was immediately published as a recording, the French one was staged by Zabou Breitman and conducted by Philippe Jordan.
With the song cycle Die schöne Müllerin, he also gave guest performances in the United States, with Haydn's The Seasons in Schloss Esterházy, with Mozart's Great Mass in C minor, K. 427 in Le Mans, Angers and Nantes.