In the 2023/24 season, in addition to a number of roles on his home stage, Petr Nekoranec appeared as Ramiro in the concert version of Rossini's La cenerentola in Prague's Smetana Hall, he made a guest appearance as Arbace (Idomeneo) at the Opéra nationale du Capitol in Toulouse and as David (David et Jonathas) at the Théâtre de Caen, the Opéra national de Lorraine in Nancy, the Théâtre des Champs-Élysées in Paris and the Grand Théâtre de Luxembourg. In July 2024 he made his debut at the Aix-en-Provence Festival as Pisandro (Monteverdi: Il ritorno d'Ulisse in patria).

Between 2018 and 2020, Petr was a soloist at the Stuttgart State Opera. His operatic engagements in recent years included the roles of Almaviva (Il barbiere di Siviglia), Ramiro (La cenerentola), and Ernesto (Don Pasquale) at the State Opera Stuttgart, Asprando (N.A. Porpora: Carlo Il Calvo) at the Margrave Theatre in Bayreuth, Almaviva at the Théâtre du Capitole in Toulouse, Oronte (Händel: Alcina) in Florence alongside Cecilia Bartoli in the title role and Pylade (Gluck: Iphigénie en Tauride) at the Opéra national de Lorraine in Nancy. He regularly collaborates with important orchestras (Czech Philharmonic, Prague Philharmonia, Czech Radio Symphony Orchestra, Prague Symphony Orchestra, São Paulo Symphony Orchestra, Warsaw Philharmonic), and conductors (†Jiří Bělohlávek, †James Levine, Keath Lockhart, Alexander Liebreich, Petr Popelka, Gianluca Cappuano, Robert Jindra, Giacomo Sagripanti, Petr Altrichter, Tomáš Netopil, Oxana Lyniv, Emmanuel Villaume etc.). He is also passionate about contemporary music and collaborates with the British composer Iain Bell.

In 2016, Petr Nekoranec was the first Czech to be selected for the prestigious two-year Lindemann Program at the New York Metropolitan Opera. From 2014 to 2016, he was a member of the Bavarian State Opera in Munich and its opera studio, where he created a number of roles, including the title roles in the operas Le comte Ory and Albert Herring. For the latter role, he was awarded the Bavarian Art Prize in Munich on 28th November 2016. In January 2018, he received another prestigious award, the 2017 Classic Prague Awards for the Talent of the Year. In autumn 2019, his profile album French Arias (Supraphon; Czech Philharmonic, conductor Christopher Franklin) was released.

Petr Nekoranec is a laureate of several prestigious European competitions. In October 2021, he won the 2nd prize in the Vincerò World Singing Competition in Naples, in January 2017 he became the absolute winner of the Francesco Viñas International Competition, held at the Gran Teatre del Liceu in Barcelona, ​​where he also received the Plácido Domingo Award. He studied singing at the Pardubice Conservatory with Jarmila Chaloupková and collaborates with the Italian opera tenor and tutor Antonio Carangelo.