Derek L. Seal

Derek L. Seal

Administrative / Regulatory Law Environmental Law Water Law
Recognized in Best Attorney USA since 2016

About Derek

Derek practices administrative and regulatory law with a focus on environmental permitting and enforcement. With more than 30 years of regulatory and legislative experience, Derek assists clients with a wide range of matters, including Texas Commission on Environmental Quality (TCEQ) contested case hearings and regulatory compliance, water supply and water rights, air, water, waste, and wastewater discharge permitting.Derek previously held roles as General Counsel of the TCEQ, Counsel to former TCEQ Chairman Kathleen Hartnett White, General Counsel in the Texas Legislature for the House Committee on Environmental Regulation, and General Counsel and Chief of Staff for Representative Warren Chisum.

Derek practices administrative and regulatory law with a focus on environmental permitting and enforcement. With more than 30 years of regulatory and legislative experience, Derek assists clients with a wide range of matters, including Texas Commission on Environmental Quality (TCEQ) contested case hearings and regulatory compliance, water supply and water rights, air, water, waste, and wastewater discharge permitting.Derek previously held roles as General Counsel of the TCEQ, Counsel to former TCEQ Chairman Kathleen Hartnett White, General Counsel in the Texas Legislature for the House Committee on Environmental Regulation, and General Counsel and Chief of Staff for Representative Warren Chisum.

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Reviews

4.6 / 5

38 Reviews

1,040 Profile Views

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Harriet Dach

Jan 31, 2026

Solid work and professional service from Derek L. Seal in Austin for Texas residents

I appreciate how Derek L. Seal handled my case. No fluff, just straight to the point and very effective representation for my Administrative / Regulatory Law matter. They are obviously very experience...

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Tyrone Ortiz

Jan 31, 2026

Reliable lawyer you can count on - Derek L. Seal provided excellent service throughout

Needed help with Administrative / Regulatory Law and Derek L. Seal delivered on their promises. They're professional, efficient, and easy to talk to. Good choice for anyone in Texas looking for high-q...

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Dorothy Grady

Jan 31, 2026

Five stars for the incredible team at Derek L. Seal in Austin - they are amazing

Best lawyer for Administrative / Regulatory Law in Austin. Period. I've seen others, but Derek L. Seal is on another level. They truly care about their clients and work hard to get the best results. I...

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Joel Schmeler

Jan 31, 2026

Outstanding experience with Derek L. Seal in Austin - truly the best legal team

Short and sweet: Derek L. Seal is the real deal and a true professional in the field of Administrative / Regulatory Law. If you're in Austin and need help with your legal issues, call them immediately...

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Jay Streich

Jan 31, 2026

Outstanding experience with Derek L. Seal in Austin - truly the best legal team

I didn't think I'd find such a good lawyer in Texas, but here we are and I am thoroughly impressed. Derek L. Seal is just awesome and exceeded all my expectations. No complaints at all! They really ta...