She is best known for her work in the feature films Boyhood, The Tree of Life, the ABC series The Good Doctor, and the History Channel drama SIX.

[5][6][7] In 2018, Welch played the role of ex-Marine Dawn who lost her leg in an IED explosion in the second season of the History Channel's drama series SIX.

[11] Although she grew up in a musical family, Welch did not sing publicly until 2005's “Chip Off the Old Block” SIMS Foundation[12] fundraiser hosted by the Braun Brothers (Reckless Kelly, Micky and the Motorcars).

A tribute concert to her father, Kevin Welch, brought her together with 3 other independent artists: Liz Foster, Jamie Lin Wilson, and Kelley Mickwee.

Welch's first public appearance was at the "Eye Love Savannah" benefit November 28, 2016 organized by Austin photographer Todd Wolfson.

[9][22] On December 23, 2016, there was a "Standing Beside Savannah" Benefit Auction at the Continental Club in Austin held during the Legends & Legacies Holiday Show, which featured multi-generation family collaborations from Austin musical families performing, including Welch's brother Dustin and father Kevin, James McMurty, John Dee Graham, and Charlie Sexton.