Tanner is licensed to practice law in Texas and Florida. Prior to starting Nielson Law, PLLC, Tanner practiced at Lowndes, Drosdick Doster, Kantor & Reed in Orlando, Florida, and subsequently served as a diplomat with the U.S. Department of State, working assignments domestically and internationally. This background enables Tanner to bring a wealth of experience and perspective to bear on legal matters. He is a member of the State Bar of Texas General Practice, Solo and Small Firm section and the Real Estate, Probate, and Trust Law section.

Tanner graduated from William & Mary School of Law, where he was a member of the law review, national trial team, and alternative dispute resolution team. He obtained his bachelor's degree from Brigham Young University.