He graduated from the Acting Department at the National Higher School of Film, Theatre and Television in Łódź as well as from the solo singing class at the Warsaw Academy of Music and the Hochschule für Musik in Dresden. He made his acting debut in 1992 in Andrzej Wajda’s The Ring with a Crowned Eagle, in which he played a small but symbolic role as Maciek Chełmicki. In the following years, he also starred in Marek Koterski’s Nothing Funny and Jerzy Hoffman’s With Fire and Sword, as well as in a few episodes of the popular 1990s TV series Extradition, Mothers, Wives and Lovers, The House. He appeared in Television Playhouse productions as well, including Sąd Nad Brzozowskim (The Judging of Brzozowski, trans. MG) based on the script and directed by Grzegorz Królikiewicz, Jarosław Iwaszkiewicz’s Samobójstwo (Suicide, trans. MG) directed by Jerzy Sztwiertnia, Jarosław Abramow-Newerly’s Słowik Warszawy (The Warsaw’s Nightingale, trans. MG) directed by Ryszard Ber and Tristan and Isolde directed by Krystyna Janda (role of Tristan). He also tried his hand at directing – in 1996, he staged Pierre Corneille’s Le Cid at the Adekwatny Theatre in Warsaw.
He made his opera debut in 1997 as Figaro in Mozart’s The Marriage of Figaro at the Wielki Theatre in Poznań. A year later he won second prize at the Antonín Dvoŕak International Vocal Competition in Karlovy Vary, which ultimately determined his artistic future. In January 1999, he performed at the Leipzig Opera (Kecal in Bedřich Smetana’s The Bartered Bride). That performance marked the beginning of Tomasz Konieczny’s collaboration with German theatres.
He spent the 1999-2000 season at the Leipzig Opera, where he sang parts of Monterone in Giuseppe Verdi’s Rigoletto and Clerk in Dmitri Shostakovich’s The Nose. In the autumn of 2000, he became a soloist of the Theatre Lübeck, where he extended his repertoire with new parts (Procida in Verdi’s The Sicilian Vespers and Ramphis in Aida, Pandolph in Jules Massenet’s Cinderella, Orestes in Richard Strauss’ Elektra). In 2002-2003, he moved to the Theatre in Mannheim, where he first performed in Richard Wagner’s dramas (King Marke in Tristan and Isolde, Amfortas in Parsifal, Wotan in The Ring of the Nibelung). He also sang the part of Sarastro in Mozart’s The Magic Flute and Osmin in Abduction from the Seraglio, Pimen in Musorgsky’s Boris Godunov and Jochanaan in Strauss’ Salome. A further strengthening of Tomasz Konieczny’s artistic position was confirmed by his guest appearances at the theatres of St. Gallen, Halle and Chemnitz and – above all else – at the Stuttgart Opera (Sarastro), the Deutsche Oper in Düsseldorf/Duisburg (Wotan) and the State Opera in Prague (Procida).
In 2006, Konieczny became a soloist of the Düsseldorf Opera, where he successively performed in numerous important parts (Golaud in Claude Debussy’s Peleas and Melisanda, Selim in Gioachin Rossini’s The Turk in Italy and Barak in Strauss’ The Woman without a Shadow). Thanks to his new Wagner roles (Kurnewal in Tristan and Isolde and the titular Dutchman in The Flying Dutchman) he started to gain international recognition. The first sign of this appreciation came in 2006, when he was invited to sing the part of Amfortas in Parsifal at the Budapest Wagner Days, organised by the famous conductor Adam Fischer. A year later he performed in Budapest as Wotan in The Valkyrie.