Telephone: 205-716-5241
Facsimile: 205-716-5389

2001 Park Place North
Suite 700
Birmingham, Alabama 35203-4804

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Diane B. Maughan

Diane Maughan litigates in Alabama state and federal courts at both the trial and appellate levels. She also represents clients in administrative and arbitration proceedings, and in regulatory matters involving compliance with federal healthcare laws and environmental laws and regulations.

Mrs. Maughan’s litigation practice includes the defense of fraud, trademark infringement, qui tam, products liability, and real property disputes including condemnation, flooding, and environmental contamination claims. Mrs. Maughan regularly represents clients in business disputes, including breach of contract, breach of fiduciary duty, and business-to-business collection matters. She has also been involved in cases relating to scientific research, including commercial research for the pharmaceutical industry and federally-funded university research.

Mrs. Maughan handles appeals of all types of civil cases in both state and federal courts. She successfully defended, in oral argument before the United States Court of Appeals for the Eleventh Circuit, a trademark infringement action against a local business owner brought by a national company. Prior to joining Cabaniss Johnston, she served as a law clerk to the Honorable Perry O. Hooper, Sr., Chief Justice of the Supreme Court of Alabama.

Mrs. Maughan obtained a Bachelor of Arts, magna cum laude, in Political Science and Environmental Studies from Baylor University in Waco, Texas, where she was inducted into Phi Beta Kappa. She subsequently graduated, summa cum laude, from the University of Alabama School of Law, where she served on the Managing Board of the Alabama Law Review, was inducted into the Order of the Coif, was a Hugo Black Scholar, and received the Dean M. Leigh Harrison Award for graduating in the Top 5% of the class.

Mrs. Maughan is the author of “Take Caution When Representing Clients Across State Lines: The Services Provided May Constitute The Unauthorized Practice of Law,” 50 Ala. L. Rev. 535 (1999). She is a member of the Birmingham and the American Bar Associations, the Alabama Defense Lawyers Association, and the Defense Research Institute. Mrs. Maughan is admitted to practice in all state and federal courts in Alabama and the United States Court of Appeals for the Eleventh Circuit. Ms. Maughan was selected for inclusion on the Super Lawyers’ Alabama Rising Stars list in 2011, 2012, 2013, and 2014.  Mrs. Maughan was also selected to B-Metro’s Top Lawyers from 2016 to 2018 and B-Metro’s Top Women Lawyers from 2015 to 2017.

NOTICE. Although we would like to hear from you, we cannot represent you until we know that doing so will not create a conflict of interest. Also, we cannot treat unsolicited information as confidential. Accordingly, please do not send us any information about any matter that may involve you until you receive a written statement from us that we represent you (an ‘engagement letter’).

To initiate a possible representation, call the telephone number located under the attorney’s photo. He or she will determine if any conflict exists, and, if not, put you in touch with an appropriate lawyer. When you receive an engagement letter from that lawyer, you will be our client, and we may exchange information freely.

Areas of Practice:

  • Business & Commercial Litigation
  • Trademark Litigation and Registration
  • Real Property Litigation
  • Health Care Law
  • Environmental Litigation and Regulatory Compliance


  • J.D., summa cum laude, University of Alabama School of Law, 1999
    • Alabama Law Review, Managing Board
    • Dean M. Leigh Harrison Award
    • Order of the Coif
    • Hugo L. Black Scholar
    • Bench and Bar Legal Honor Society
  • B.A., magna cum laude, Baylor University, 1996
    • Phi Beta Kappa

Admitted to Practice:

  • Alabama State Bar (1999)
  • All Alabama U.S. District Courts
  • Eleventh Circuit Court of Appeals