He is a member of the progressive acoustic quintet Punch Brothers and a founding member of Hawktail, an acoustic supergroup composed of Kowert, fiddler Brittany Haas, guitarist Jordan Tice, and mandolinist Dominick Leslie.
[2][3] While still pursuing his degree at Curtis, Kowert was recruited to join Punch Brothers.
"[3] He remained the only non-founding member of the ensemble until Brittany Haas joined in 2023.
Additionally, Kowert regularly uses a C extension, resulting in an even wider range of pitch (i.e., C, B, E, A).
[6][7] This modification, Kowert claims, has proven indispensable for the demands of touring, particularly with Punch Brothers.