William has practiced litigation in Texas since 2012, when he joined the litigation practice at Mullin Hoard & Brown, LLP in Amarillo. His legal experience includes complex bankruptcy and commercial litigation matters including professional misconduct, director/officer liability, breach of fiduciary duty, and contractual disputes. William’s largest practice area at MHB was working on bank failure matters on behalf of the FDIC, where he was part of the team that won the largest audit failure trial award in American history – $625.3 million awarded to the client.
Between 2018 and 2020 William established a solo practice and worked on a wide range of small business and healthcare matters including HIPAA compliance, employment disputes, and debt recovery. Also in 2018 William joined the faculty in the Engler College of Business at West Texas A&M University to teach business and health law courses as an adjunct professor. From 2021 to 2025, William was a full-time Clinical Assistant Professor with WTAMU. His courses cover a wide array of healthcare topics, ranging from medical malpractice, Medicare/Medicaid, employment law, and healthcare regulation. His other courses included Business Law, Procurement Law, and Accounting Ethics.
In addition to his legal work Mr. Biggs is an active volunteer in his community. He is a past board member and vice president of the Amarillo Local Government Corporation, the city body charged with redeveloping downtown Amarillo. During his tenure as vice president of the ALGC he oversaw the construction of a $40.5 million hotel, a $20 million garage, and a $45.5 million ballpark, as well as the negotiation of a long-term contract for the highest paying tenant in the Texas baseball league, the AA affiliated Amarillo Sod Poodles. He has also been a board member of the Amarillo Area Young Lawyers Association.
William Biggs received his undergraduate degree from the University of Texas at Austin, where he was a member of the Psi Chi and Phi Beta Kappa honors fraternities. He attended law school at the University of Chicago where was an active member of the American Constitution Society, the International Law Society, and a board member and treasurer for the Health Law Society. William was a member of the founding class of the University of Chicago’s Gendered Violence Clinic, assisting the victims of domestic violence with free legal aide.
Representative cases include:
- FDIC v. PricewaterhouseCoopers – Bank failure stemming from audit malpractice; damages in excess of $3 billion.
- Overseas Shipping Group, Inc. v. Proskauer Rose LLP – Bankruptcy litigation, $255 million legal malpractice claim for negligent tax advice.
- Ochiltree County Hospital District v. Healthland, Inc. – Breach of contract and fraud claim related to electronic medical records software.