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James D. Hannagan

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Dallas Office

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Biography

Although J.D. Hannagan primarily represents clients in the areas of ad valorem tax, employment law, and business litigation, his experience in these areas has opened his practice to a broad range of legal disputes, including condemnation matters, breach of contract claims, landlord/tenant disputes, and consumer actions brought under the Texas Deceptive Trade Practices Act.

He strives to produce the best outcome for his clients in the most efficient manner possible.  Sometimes the best outcome requires negotiation and alternative dispute resolution. At other times, aggressive litigation is the only solution.  Whether by negotiation or litigation, Mr. Hannagan works tirelessly to solve clients’ legal challenges and gain the outcomes they desire.

For his work on complex cases on behalf of his clients, he was named to the list of Texas Super Lawyer Rising Stars from 2014 to 2019. This list includes approximately 2.5 percent of the most outstanding lawyers in Texas under age 40 or with less than 10 years of experience in the law. One of  the steps to selection is to be recommended by one of the more senior lawyers, the Texas Super Lawyers.

Texas Rising StarsThomson Reuters – 2014 to 2019

Mr. Hannagan received his bachelor’s degree in business administration from Texas Christian University in 2004. After graduation, he attended Texas Tech University School of Law. During law school, Mr. Hannagan served as an Articles Editor for the Texas Tech Administrative Law Journal. During his last two years of law school, he worked at a small firm that handled legal matters ranging from high stakes personal injury cases to defending those accused of capital murder.

In 2007, he graduated from law school, was licensed by the State Bar of Texas and immediately went to work at Geary, Porter & Donovan. He practices law in all state and federal courts across Texas. He is a member of several professional associations, including the Dallas Bar Association and the Dallas Association of Young Lawyers.

Areas of Practice

Business Litigation

Property Tax and Eminent Domain

Employment Law

Bar Admissions

State Bar of Texas

U.S. Court of Appeals for the Fifth Circuit

U.S. District Court for the Northern District of Texas

U.S. District Court for the Western District of Texas

U.S. District Court for the Eastern District of Texas

U.S. District Court for the Southern District of Texas

Education

Texas Tech University School of Law, cum laude, 2007 (Doctor of Jurisprudence)

Texas Christian University, 2004 (Bachelor in Business Administration)

Awards & Honors

Texas Super LawyersThomson Reuters, 2020

Texas Rising StarsThomson Reuters - 2014, 2015, 2016, 2017, 2018, and 2019

Professional Associations and Memberships

Member, Dallas Bar Association

Member, Labor and Employment Section of the Dallas Bar Association Member

Member, Litigation Section of the Dallas Bar Association

Member, Dallas Association of Young Lawyers

Articles and Publications

Author, Judicial Review of an Agency Decision: The Implications of Mega Child Care, Inc., Texas Tech Administrative Law Journal (2006).

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Dallas Office
16475 Dallas Parkway, Suite 400
Addison, Texas 75001-6837
972-931-9901  |  972-931-9208 Fax
(Reception Hours -
8:30 a.m. to 5:30 p.m. Monday-Friday)

Houston Office
3900 Essex Lane, Suite 1116
Houston, Texas 77027-5111
713-621-8665  |  713-802-1471 Fax
(By Appointment Only)

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