Glen D. Mangum Knows Employment Law

Have you been rejected for employment because of your race, national origin, sex or for some other prohibited reason? Are you being paid less than your co-workers because of your employer’s bias or prejudice? Have you been denied a promotion or been demoted? Or worse, have you been fired? If so, please contact the Law Offices of Glen D. Mangum in San Antonio, TX for a consultation.

Standing up to your employer can be an extremely scary decision on your own. That’s why I’ll stand with you every step of the way to ensure your civil rights are upheld. I’ve been practicing employment discrimination law since 1982, and I have devoted my practice to the zealous but ethical representation of employees for over 38 years.

6 Reasons To Choose Us


Mr. Mangum has 40+ years of experience.

Standouts in the Profession

Mr. Mangum is licensed to practice law in all courts of the State of Texas

Thought Leaders

Mr. Mangum has also spoken at numerous conferences and seminars on employment law issues.

Award- Winning

Mr. Mangum has been recognized for several years as a Super Lawyer by Texas Monthly magazine, as a Best Law Firm by U.S. News & World Report, and and is rated Very High in both Legal Ability and Ethical Standards by Martindale-Hubbell.


Mr. Mangum is focuses exclusively on labor and employment matters and approaches your matter with the expertise and skill necessary for excellent results.

Practice Areas

Employment Discrimination

If something doesn’t feel right about the way you’re being treated at work, trust your instincts. Get in touch with the Law Offices of Glen D. Mangum for access to a wrongful termination or workplace discrimination lawyer in San Antonio or South Central Texas. I’ll go over your rights and develop a strong case if your rights have been violated.

Public Employment

Going up against a government entity when you think you’ve been wronged as an employee can be a scary proposition. Fortunately, you don’t have to face it alone. Attorney Mangum of the Law Offices of Glen D. Mangum is an experienced public employment lawyer in San Antonio and South Central Texas. He also serves Bexar County, TX.

Non-Compete & Non-Solicitation Agreements

Deciphering the nitty-gritty of your employment agreements can be confusing. Turn to the Law Offices of Glen D. Mangum for help. Attorney Mangum is a knowledgeable non-compete agreement lawyer serving San Antonio, TX. He also serves Bexar County, TX.

Severance Agreements

Many employers have come to the conclusion that, even if they do not believe that they have behaved themselves unlawfully, or believe that they have no legal liability for terminating an employee, it is a wise business decision to offer a departing employee a severance payment in exchange for a release of liability.

Learn More About How I Can Help

From negotiating employment agreements to wrongful termination claims, you can depend on me to work tirelessly on your behalf. My practice areas include:

Employment discrimination law and retaliation

Whistleblower cases

Federal sector EEO and MSPB cases

Employment agreements, including non-compete agreements, non-solicitation agreements and severance agreements

From negotiating employment agreements to wrongful termination claims, you can depend on attorney Glen D. Mangum to work hard on your behalf. My practice areas include:
I also offer consultation services. Consultations are conducted either in person or by phone, and are usually one (1) hour in length. Prospective clients are initially screened by phone, and, if it appears that your matter is within my area of expertise, a consultation appointment is scheduled. A fee of $150.00 is charged for a consultation.

You Need An Experienced Employment Lawyer To Handle Your Matter

I know I’m one of about two dozen employee lawyers in the San Antonio, TX area, so your options aren’t limited. In fact, two of my competitors work beside me in the same office. My ultimate goal is for you to get the best possible results in your case. If I think another lawyer might be able to help you more, I’ll be happy to refer you.

With that being said, I’m confident I can assist you. I have tried cases in both federal and state courts and before arbitrators. I have also represented federal civil service employees, state and local government employees as well as university, college and school district employees in various judicial and administrative proceedings.

Federal Government Agencies

Maryland State Government Agencies
Non-Profit Agencies
Other Employment Related Organizations

What Our Clients Say

“As I was seeking an attorney I contacted Mr. Mangum using his website and was contacted immediately by his office. Quick response has been his practice at all times. I felt in my first face to face meeting he was very knowledgeable about the law. He never talked down to me. Glen always seemed to have time to answer my questions and would follow up with written documentation for me to review and clarify any issues or concerns I may have had. Though busy in his practice, I felt he had time for me and would work around his schedule to accommodate phone conferences when I couldn’t be available for face to face meetings. As a result of these actions, I felt I was a very important client and he devoted his time to the events as they occurred. Glen would always provide alternative methods in pursuing my case. I would highly recommend Glen to anyone seeking legal advise regarding work issues.”



“At the outset, I sensed a level of expertise and understanding with Mr. Mangum that allowed me to easily decide to retain him as my lawyer. He consistently and frequently kept me abreast of the case while addressing any and all questions that came to mind. Mr. Mangum is not only a professional because of his competence, but because he is caring and serves his clients first and foremost.”



“I had a very good experience with Mr. Mangum. He took the time to sit with me to discuss my case, gave me his honest opinion, and pursued my case as if he was my family member. He made me feel like he was truly on my side. When I encounter anyone, who feels they need a lawyer to protect their professional license or needs a healthcare lawyer to have their back-due to administrative injustice, I would refer them to him. With great appreciation for Mr. Mangum, I hope I never need him again. However, if I do he will always be the first healthcare lawyer I will call.”