Haas continued to tour and record while simultaneously earning a degree in Evolutionary Biology at Princeton University, where she also minored in Music Performance and composed tunes with her professor Dan Trueman that eventually became their co-written album Crisscross. It was during her time at Princeton that Brittany was asked to join the seminal chamber-grass band Crooked Still, with whom she has made four recordings and toured the world.

Haas has always been a much sought-after collaborator and session musician. She has performed on Late Night With David Letterman and Saturday Night Live as part of Steve Martin’s bluegrass band, and features on Martin’s Grammy-winning album The Crow: New Songs for the 5-String Banjo. Over the years, she has performed with Bela Fleck, Abigail Washburn, Tony Trischka, Yonder Mountain String Band, The Waybacks, Alasdair Fraser & Natalie Haas (her cellist sister), and more.

Now residing in Nashville, TN, Brittany is currently involved in many exciting projects. In January of 2020, her quartet Hawktail (formerly Haas Kowert Tice, featuring bassist Paul Kowert of Punch Brothers, guitarist Jordan Tice, and mandolinist Dominick Leslie) released their follow-up album to 2018’s Unless. They continue to tour around the country with their original material. In 2015, Haas began touring with the Dave Rawlings Machine (featuring Gillian Welch) and can be found on their latest releases Nashville Obsolete and Poor David’s Almanac. In the fall of 2016, Haas began performing as part of the house band for Live From Here (formerly known as ‘A Prairie Home Companion’) hosted by Chris Thile. Brittany also continues to collaborate with her cellist sister Natalie Haas, Quebecois guitarist Yann Falquet, master Scottish fiddler Alasdair Fraser, Swedish fiddler Lena Jonsson, and percussive dancer Nic Gareiss.

In addition to her work as a performer, Haas is an instructor at various string and fiddle camps across the globe, sharing her knowledge and passion in hopes of inspiring the next generation of fiddle players.