Derk Wadas

Derk Wadas: Attorney with Rosenthal & Wadas, PLLC
  • Founding Partner at Rosenthal & Wadas, PLLC (7 Attorneys)
  • 4500 Eldorado Parkway, Suite 3000, McKinney, TX 75070
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Derk Wadas is a founding partner of Rosenthal & Wadas, PLLC. He has been successfully practicing criminal law and procedure exclusively since 1998. Derk is Board Certified in Criminal Law by the Texas Board of Legal Specialization.

From 2014-2018 Derk was selected to the Texas Super Lawyers list. This recognition is given to less than 5% of the attorneys in the state. He was also named a “Top 100 Trial Lawyer” by the National Trial Lawyers Association.

Derk is a former Collin County Assistant District Attorney where he served a felony criminal prosecutor, and was the chief misdemeanor prosecutor in County Courts at Law One and Two. As a prosecutor, Derk tried over seventy-five cases to a jury and handled hundreds more successfully. As a defense attorney, Derk has tried many more cases and has achieved numerous “Not Guilty” verdicts, charge reductions and outright dismissals.

It is very important to Derk to remain at the forefront of the developing law and defenses in his field. For this reason he is a member of organizations such as the Collin County Criminal Defense Lawyers Association, where he serves as President; the Texas Criminal Defense Lawyers Association, the Bar Association for the Federal Fifth Circuit and the Association of Federal Defense Attorneys.


Plano DWI Lawyer Blog, Texas Lawmaker Proposes Mandatory Interlock Devices for First Time DWI Offenders, 2011

Plano DWI Lawyer Blog, Roadside Checkpoints are Constitutional: Texas Court of Criminal Appeals, 2011

Plano DWI Blog, Are Texas Sobriety Checkpoints Just Down the Rod for Collin and Dallas County Motorists?, 2009

Plano DWI Blog, Texas DWI suspects and the Intoxilyzer 5000 Source Code


Association of Federal Defense Attorneys, 2013 - Present

Bar Association of the Fifth Federal Circuit, 2008 -Present

Texas Criminal Defense Lawyers Association, 2005 - Present

Collin County Criminal Defense Lawyers Association, Vice President, 2005 - Present

Standardized Field Sobriety Tests

Areas of Practice (10)

  • Criminal Defense
  • Federal Drug Cases
  • Federal Firearm Cases
  • DWI
  • Drug Crimes
  • Family Violence
  • Theft and White Collar Crimes
  • Weapons Offenses
  • Eligibility for an Expunction
  • Probation Violation

Education & Credentials

Contact Information:
972-845-5054  Phone
(972) 846-4857  Phone
(972) 369-0532  Fax
University Attended:
Wilkes University, B.A., Political Science, 1994
Law School Attended:
Vermont Law School, J.D., 1997
Year of First Admission:
1997, Pennsylvania; 2004, Texas
Payment Information:
  • Free Initial Consultation

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McKinney, Texas

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