Judge Sullivan has held positions of significance in almost every area of the legal profession, including 21 years as a lawyer in private practice, government service as the Texas First Assistant Attorney General, and as a judge on both the trial and appellate benches. Head of the firm’s Energy Litigation Team and co-leader of the Appellate Litigation Practice, Judge Sullivan advocates for clients in complex commercial and civil litigation where he provides a second-to-none understanding of the Texas legal landscape and strategies for coordinating multi-jurisdictional litigation. He also advises clients on government relations matters, ranging from inquiries to investigations.
From 2008 to 2010, Judge Sullivan served as a justice for the Texas Court of Appeals in Houston, where he participated in the disposition of hundreds of appeals and personally authored more than 75 opinions. From 2003 to 2006, he served as a District Judge where he presided over multiparty cases to verdict involving such diverse subject matter as intellectual property rights and casino management fees.
In 2006, Judge Sullivan was appointed by the Texas Attorney General to serve as First Assistant Attorney General. In that role, he oversaw both the legal and administrative functions of the 800-attorney agency. Judge Sullivan supervised the representation of the state in its broad range of legal disputes and provided legal advice to many of the state’s officeholders and agencies. He was also actively involved in the coordination of multi-state legal disputes, often working with other state attorneys general and the National Association of Attorneys General.
Prior to his appointment to the bench, Judge Sullivan was a trial lawyer in private practice for more than 20 years. He also served as the managing partner for a 45-lawyer litigation law firm primarily focused on civil trial defense and for a 15-lawyer plaintiffs firm in Houston. Judge Sullivan’s complex civil litigation experience includes commercial, environmental, toxic tort and products liability matters.
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