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Our Attorneys

Meet Our Team

George Whittenburg

George Whittenburg

Founding Partner
Amarillo Office

Phone: 806-372-700
Fax: 806-372-5757

1010 S. Harrison
Amarillo, TX 79101

Texas Board of Legal Specilization[clear]

“In person, George has a congenial personality, but during a lawsuit, he is a pit bull.” Texas Monthly, 2006

George Whittenburg, along with his brother Mack founded Whittenburg Law Firm over forty years ago.

Board Certified – Civil Trial Law - Texas Board of Legal Specialization (http://www.tbls.org)

Emeritus Council Member, ALI (http://www.ali.org)

Named as a Texas Super Lawyer, 2006 & 2008 (http://www.superlawyers.com)

Beta Alpha PsiBeta Gamma SigmaPhi Delta PhiOrder of the Coif;

Research Editor, Texas Law Review, 1967-1968; Advisor, A Practical Guide to Achieving Excellence in the Practice of Law (ALI-ABA, 1992);

Speaker, “Dealing with Conflict of Interest Issues”, State Bar of Texas Legal Malpractice Institute, Dallas, Texas, 1993;

Life Fellow, American Bar FoundationTexas Bar Foundation. (Board Certified, Civil Trial Law, Texas Board of Legal Specialization)

Practice Areas

Civil Law; Complex Litigation; Business Litigation; Legal Malpractice Law; Professional Liability


1968, Texas;

1970, U.S. Court of Appeals, Fifth Circuit;

1977, U.S. Court of Appeals, Tenth Circuit;

1981, U.S. Supreme Court and U.S. Court of Appeals, Eleventh Circuit;

1991, District of Columbia

Law School

University of Texas, J.D., with honors, 1968


University of Texas, B.B.A., with honors, 1965


Amarillo, Dallas, and American Bar Associations;

Bar Association of the Fifth Federal Circuit;

District of Columbia Bar;

State Bar of Texas (Participant, Special Disciplinary Counsel Program, 1994- );

American Law Institute (Member of Council, 1989- ;

Adviser, Restatement of the Law Governing Lawyers, 1986-1999)


David Strange

David Strange

Partner – Immigration Practice Group
Lubbock Office

Fax: 806-712-2828

820 Buddy Holly Ave. Ste 12
Lubbock, TX 79401

Texas Board of Legal SpecializationAILA logo[clear]

David N. Strange is a managing partner at Whittenburg Strange & Walker, P.C., with offices in Texas (Amarillo, Dallas, and Lubbock) and New Mexico (Clovis, Tucumcari, and Albuquerque). David has taught courses in Immigration Law, Advanced Immigration Law, and Directed Research at the Texas Tech University School of Law since 2008.

David is Board Certified in Immigration and Nationality Law by the Texas Board of Legal Specialization, and he has authored several articles discussing U.S. immigration law.

In addition to his legal career, David graduated from the Defense Language Institute/Foreign Language Center, Presidio of Monterey, California, Summa Cum Laude, and subsequently served as a Russian Linguist/Cryptologist in the United States Navy.

David also received a Certificate of Advanced Spanish from the Insituto Biblico Nacional de Venezuela, and served there as an English instructor.

Presently, David is a Member of the State Bar of Texas, the Immigration and Nationality Law section of the State Bar of Texas, the American Immigration Lawyers Association, the Amarillo Area Bar Association, and the College of the State Bar of Texas.

Len Walker

Len Walker

Attorney – Criminal Practice Group
Albuquerque Office

Fax: 505-247-9393

707 Broadway Blvd NE, Ste 100
Albuquerque, NM 87102


Len Walker is the Managing Attorney for New Mexico and the firm’s Criminal Practice Group. Mr. Walker has lead more than 100 jury trials and applies his 20 years of experience in criminal and civil litigation assisting firm clients through matters that complicate the immigration process.

Prior to becoming an attorney, Len served in the US Navy Submarine Service for eight years followed by working in Washington, D.C. on submarine safety and quality assurance issues. He is a graduate of the Navy’s Advanced Polaris/Poseidon Program.


1993, State of New Mexico

1994, United States District Court, Texas Northern District

1995, State of Texas

 Law School

1993, Juris Doctor, University of Tulsa, College of Law

Undergraduate - 1989, West Texas State University, B.B.A.

John W. Lawit

John W. Lawit

Attorney – Immigration Practice Group
Dallas Office

Phone: 214-267-2400
Fax: 214-267-2424
Website: www.jlawit.com

1625 W. Mockingbird Ln, Ste 303
Dallas, TX 75235


John W. Lawit recently moved to Dallas from New Mexico where he was a resident since 1970. He received his J.D. from the University of New Hampshire School of Law in 1977 and he received his B.A. from the University of New Mexico, with honors in 1972. John became a member of the Pennsylvania Bar Association in 1978, the New Mexico Bar Association in 1980, the Texas Bar Association in 1992, and the Canadian Bar Association in 2009. John has been performing as a Foreign Legal Consultant under the Law Society of British Columbia since 2009. John is a member of the American Immigration Lawyers Association (AILA), the Albuquerque Bar Association, the El Paso Association of Immigration and Nationality Lawyers, he has served on the board of directors of the New Mexico ACLU (American Civil Liberties Union) and has been a member and served as a volunteer attorney of the American-Arab Anti-Discrimination Committee.

John has served as chairman of the New Mexico Immigration Law Section of the New Mexico Bar Association; he is the author of the New Mexico Immigration and Nationality Law Practice Act, which was the first law enacted within the United States to protect immigrants from the unauthorized practice of immigration law. The law has served as model legislation, which has been enacted in twenty States. John is regularly invited to speak at immigration law conferences throughout the United States and internationally. He appears before consulates on behalf of the firm’s clients throughout the world.

John’s accomplishments include serving as an adjunct professor of immigration law at the University of New Mexico’s School of Law (1983-1988). He was selected by the United States Department of Justice to serve as United States Immigration Judge; he was the youngest attorney to be selected. John has received the AV rating, the highest possible rating from the prestigious Martindale Hubble Law Directory. He is listed in the Martindale-Hubbell Bar Register of Preeminent Lawyers. John also appears in Who’s Who in American Law and has been listed in Best Lawyers in America for over twenty years. John has been appointed by two New Mexico Governors to the New Mexico Border Commission (1982-1986); he has been appointed as special immigration counsel to the Republic of Mexico by the Mexican Ministry of Foreign Affairs (1983) and was appointed by the Governor of the State of New Mexico to the New Mexico International Trade/Investment Counsel (1984-1987).

John has served the local community as the founder of the immigration project, Jewish Family Services of Albuquerque (1988-1990); he has served as a member of the board of directors and the president of Rainbow House International Adoption Agency (1987-2000); he served as vice president of the New Mexico Refugee Association (1979-1984); member of the board of directors for Healing of Children (1989-1995); and member of the board of directors of the Institute of Spanish Arts (1994-1996). John has received awards from Catholic Social Services and Jewish Family Services for providing immigration assistance to both organizations.

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