Justin graduated from the S.J. Quinney College of Law in 2014. He was an active duty marine from 2002 until 2006. He interned with the Federal Public Defender District of Utah in 2013-2014, was an extern with the Rocky Mountain Innocence Clinic from 2012-2013, and interned with the ACLU of Utah during the summer of 2011. He joined the Salt Lake Legal Defender Association in 2016.