[2] After growing up in rural Connecticut, an environment that greatly influences his work,[3] Timo Andres attended Yale University for both his undergraduate and graduate education, studying with Martin Bresnick, Ingram Marshall, Aaron Jay Kernis, Christopher Theofanidis, John Halle, Matthew Suttor, Kathryn Alexander, Michael Klingbeil, and Orianna Webb, where he was a member of Skull and Bones.

[11] Andres has performed solo recitals at (Le) Poisson Rouge,[12] Wigmore Hall and Lincoln Center,[13] and alongside artists such as Gabriel Kahane,[11] Philip Glass,[14] and David Kaplan.

Alex Ross of The New Yorker has called Andres "quietly awesome" and his music "the kind of sprawling, brazen work that a young composer should write.

"[7][15] Andres draws from a wide array of influences, including bands such as Sigur Rós, Boards of Canada, Brian Eno and Radiohead,[5] as well as classical music by Brahms, Schumann, Mozart, and Charles Ives.

[17][18] He arranged music from Stevens' 2005 album Illinois for a 2024 Broadway adaptation, Illinoise, for which he received a Tony Award nomination for Best Orchestrations.