[1] He made his debut at the Metropolitan Opera in New York City, as Enrique in The Exterminating Angel by Thomas Adès.
Further roles at the house included Derek in Nico Muhly's Marnie and the Pony Express Rider in Puccini's La Fanciulla del West.
[1] In 2018, Koziara performed the title role of Mozart's Ideomeneo with the Wolf Trap Opera.
[2] In 2019, he appeared in the leading role of Fritz in Schreker's Der ferne Klang at the Oper Frankfurt, where the work's world premiere had taken place in 1912.
The production was directed by Damiano Michieletto and conducted by Sebastian Weigle, with Grete, his partner on stage, sung by Jennifer Holloway.