Tanner has spent much of his career representing a wide range of companies, in the banking, trust, insurance, and investment banking industries in both litigation and compliance. As a litigator he focuses in the areas of commercial litigation, business and fiduciary litigation, banking law, appellate advocacy, internal investigation and compliance, and government investigations. Tanner has represented banks throughout the nation in class actions, multi-district litigation, and investigations from state attorneys general.  He also has experience handling a variety of consumer finance claims, including creditors' rights and FDCPA, FCRA, and TCPA compliance and defense.

He handles trials, injunction hearings, and appeals in state and federal courts and arbitrations as well as governmental and regulatory investigations. Understanding that every client has unique circumstances, Tanner places a premium on thoroughly analyzing each matter before crafting a strategy that meets his client’s objectives, whether it’s negotiating a settlement or building a defense for trial, which enables him to quickly tailor his approach to fit each client’s needs.

Tanner is dedicated to advancing the legal profession. In 2015-2016, he served as chair of the Kentucky Bar Association Young Lawyers Division. In that position, Tanner was the head of Kentucky’s 5,000 young lawyers. As head of the KBA YLD, Tanner, along with the attorney general of Kentucky, created and implemented the Legal Food Frenzy, an annual fundraiser which seeks to raise $150,000 for Kentucky’s food banks. In 2018, Tanner was elected to the Kentucky Bar Association Board of Governors, the youngest member elected to the Board of Governors in the past 20 years. In 2024, Tanner was elected as the Vice President of the Kentucky Bar Association, again the youngest vice president elected in the past 20 years. In addition to Tanner’s work with the Kentucky Bar Association, he is very active in the American Bar Association, serving as the Kentucky Bar Association’s representative to the House of Delegates. Because of Tanner’s successful professional career, as well as his professional and community involvement, he was named Kentucky's 2017 Outstanding Young Lawyer of the Year, and in 2018, was awarded the Outstanding Young Professional of the Year from the University of Kentucky College of Law.

Tanner is also a leader in both the Louisville and greater Kentucky community. Currently, he serves as a member of the Speed Art Museum Board of Trustees. From 2017-2024, Tanner also served on the board of trustees for the Kentucky College of Art and Design, where, at the age of 35, Tanner successfully chaired its $12 million capital campaign. In 2020, Tanner created Enrich Louisville, acoalition of out of school time providers working together to reduce barriers and increase access to enrichment opportunities for all students. In 2023, Tanner was appointed as the litigation chair for the Kentucky Chamber of Commerce, and, in that position sits as an ex officio member of the Chamber’s Board of Directors. In 2024, Tanner was selected to Leadership Kentucky, a program, which concentrates Kentucky’s leaders to understand the Commonwealth’s challenges and assets.