 Upon leaving state government in 2011, Miller went into private legal practice at Frost Brown Todd, a major regional law firm with offices in nine states and more than 525 attorneys.On March 29, 2017, Miller was named Member-in-Charge of the law firm's Lexington, KY office.In 2012, after publishing a column on cannabis reform, Miller was enlisted by Kentucky Commissioner James Comer in a successful bi-partisan effort to secure the legalization of hemp in the Bluegrass State.