Barlow began his career as an associate at Locke Lord Bissell & Liddell LLP from 1998 to 2000. From 2000 to 2010, he worked at Sidley Austin; first as an associate from 2000 to 2006, and then as a partner from 2006 to 2010.[2] In 2011, he served as general counsel and chief Judiciary Committee counsel to United States Senator Mike Lee.[3]
U.S. attorney for the District of Utah
On August 2, 2011, Barlow was nominated to be the United States attorney for the District of Utah. He was confirmed by voice vote on September 26, 2011.[4] He resigned from the Department of Justice in July 2014.
Return to the private sector
From 2014–2017, Barlow was again a partner at Sidley Austin. He was Vice President for compliance for Walmart’s Health and Wellness businesses from 2017–2018 in Bentonville, Arkansas. Barlow returned to Utah in 2018, when he became a partner in Dorsey & Whitney's Trial and Government Enforcement & Corporate Investigations Practice groups. Barlow worked at Dorsey & Whitney until becoming a judge.[5]