As a partner at the McMahan Law Firm, LLC, D. Seth Holliday litigates disability, health and life insurance claims on behalf of individuals who have been wrongfully denied their benefits. He is also dedicated to representing the seriously injured in personal injury litigation.

Regarding private insurance benefits, Mr. Holliday has sued such insurance companies as Unum, Hartford, Prudential, Standard, Guardian/Berkshire, Cigna, MetLife, Aetna, Liberty Mutual, Mass-Mutual, and others that have denied individuals their private disability insurance (called “long-term disability” or “LTD”), life insurance or health insurance claims. His track record here is superb, and he obtains excellent results for his clients. Mr. Holliday is one of only a handful of attorneys across the United States who practices heavily in these areas. He has represented well over two thousand claimants at Social Security hearings and has a very high success rate.

Attorney Holliday is a 1996 graduate of Washington University School of Law and he initially practiced in Chicago, Illinois. There, in the personal injury context, he had a principal role in obtaining three awards which were confirmed by the local jury verdict reporter as being the highest on record in the State of Illinois in their respective category.

Attorney Holliday has been a leader in prominent organizations. He is a former member of the Board of Governors of the Tennessee Association for Justice, past-chair of the Disability Law Section of the American Association for Justice, past-chair of the TBA’s Disability Law Section of the Tennessee Bar Association, and past-president of the Chattanooga Trial Lawyers Association. These are all associations of lawyers who advocate on behalf of injured or disabled individuals. Mr. Holliday has lectured regularly on disability issues to other attorneys and has also taught trial advocacy at the DePaul University College of Law in Chicago and business law at Chattanooga State Technical Community College in Tennessee.

Additionally, Mr. Holliday provides free legal services to a variety of charitable organizations in the Chattanooga area, including the Chattanooga Community Kitchen and Legal Aid of East Tennessee. He is a two-time past recipient of the Pro Bono Excellence Award. Mr. Holliday is a former member of the board of directors for Hospice of Chattanooga, having served as chairman of its governance committee and as a member of its executive and finance committees.


  • Social Security disability
  • Health and life insurance claims
  • Administrative law
  • Personal injury claims
  • Long-term disability and ERISA claims
  • Insurance litigation
  • Disability law


  • Illinois, 1996
  • U.S. District Court, Northern District of Illinois, 1996
  • Tennessee, 2003
  • U.S. District Court, Eastern District of Tennessee, 2004
  • U.S. District Court, Middle and Western Districts of Tennessee, 2008
  • U.S. Court of Appeals for the 6th Circuit, 2009
  • U.S. District Court, Middle District of Georgia, 2010
  • Georgia, 2013
  • U.S. District Court, Northern District of Georgia, 2015


  • Certified as a Specialist in Social Security Disability Law by the National Board of Social Security Disability Advocacy.



  • J.D., Washington University School of Law, 1996
  • B.A, Millsaps College, 1991


  • National Association of Social Security Claimants’ Representatives
  • American Association of Justice
  • Tennessee Bar Association
  • Tennessee Association of Justice
  • Chattanooga Trial Lawyers Association



  • Chattanooga State Technical Community College, spring 2008
  • DePaul University College of Law, fall 1999


  • Moderator – Social Security Disability and ERISA Law Sections Presentation
    • American Association for Justice Annual Convention
    • 2012
  • Moderator – Disability Benefits Forum
    • Tennessee Bar Association CLE Seminar
    • 2011
  • Speaker – What Trial Lawyers Need to Know About Subrogation and Offsets in Long Term Disability & Social Security
    • Kentucky Justice Association CLE Seminar
    • 2010
  • Speaker – Interplay Between Social Security Disability and Long-Term Disability
    • Arkansas Trial Lawyers Association CLE Seminar
    • 2010
  • Speaker – Ethical Considerations for Social Security Disability Attorneys
    • Tennessee Bar Association CLE Seminar
    • 2009
  • Speaker – Social Security Disability: The Basics and Beyond
    • Tennessee Association for Justice CLE Seminar
    • 2008
  • Speaker – Social Security Disability
    • National Business Institute CLE Seminar
    • 2007
  • Speaker – Social Security Disability
    • National Business Institute CLE Seminar
    • 2006