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About me

John W. Armstrong III was born in Kerrville, Texas. By 1961, his family had moved to Southwest Houston. John graduated from Westbury High School.

John joined the Harris County Sheriff’s Department in 1975. He served as a Bailiff and Process Server in the District Criminal Courts of Harris County. In 1980, John was promoted to Sergeant. He was assigned to the Detention and Special Services Bureaus.


It should be noted that from 1980 to 1982, John helped organize and subsequently serve on the board of directors of the first Harris County Deputy Sheriff’s Association. This association was started to help achieve professionalism in the department through civil service and was supported by the Sheriff. After its formation, John was elected to Vice President and placed in charge of the legislative committee.


During 1980 and 1981, John spent numerous hours working on this committee and traveling to Austin to lobby legislators and speak before committees trying to get the department civil service.  Finally, in May 1981, the hard work came to fruition and the Governor signed the bill bringing the department under civil service. Before leaving the Department, John was one of a group of individuals who helped write the Civil Service Regulations for the Deputies.


In 1981, John was promoted to the rank of Lieutenant and assigned to the Detention Bureau, as an Administrative Lieutenant. In 1982 John was transferred to the Sheriff’s Academy as the Training Coordinator overseeing all the training programs for the Department.


The culmination of the experience of lobbying in Austin, realizing his potential through such quick advancement in rank in a short tenure, as well as recognizing his love for the courtroom, became the impetus to push John into resigning from the department to go back to college and go on to law school.


Incidently, if you are beginning to wonder whether John can go against the deputies or the department he worked so hard to help professionalize or any others for that matter. You should know that since becoming a lawyer, John has been in two federal lawsuits against the Sheriff, represented Deputies in job disputes against the department, as well as represented individuals, both deputies and citizens, charged with a criminal offenses by the department. In other words, John has no fear in representing someone against the Department or its personnel.


In 1982, John re-enrolled as a Freshman at Texas State University (Southwest Texas State University) in San Marcos, Texas. While attending Texas State University, John was on the Dean’s List every semester, graduating Cum Laude in May,1986 with a Bachelor of Arts Degree. While attending college he was a member of Alpha Chi National Honor Society; Pi Gamma Mu International Honor Society in Social Science and Phi Kappa Psi National Fraternity.


In 1987, John attended Saint Mary’s Law School. John transferred at the end of his first year to South Texas College of Law, and began working full time for the law firm of Ramsey & Tyson while attending law school. John graduated in 1989 and was licensed by the Supreme Court of Texas in November, that same year. In September, 1990 John went into private practice.


During the years of his practice from 1991 to 1999, John was also an Instructor, at night, in the Law Enforcement Academy at the Houston Community College. John has taught "Basic Police Academy" classes as well as "In-Service" training schools for veteran peace officers in the following areas of the law: "Texas Penal Code"; "Texas Code of Criminal Procedure", "Arrest, Search and Seizure"; "Use of Force"; "Family Code", "United States and Texas Constitutions"; "Ethics", and "Civil Process and Liability." John taught these subjects while maintaining a full time law practice. Finally, in 1999 John resigned deciding to devote more time to his family and to his growing practice.



He is licensed to practice in all State Courts and in the Northern, Southern, Eastern, and Western United State District Courts of Texas as well as before the United States Fifth Circuit Court of Appeals in New Orleans. John has served as volunteer speaker in the speaker’s bureau for the Houston Bar Association, lectured before the Galveston Criminal Lawyer’s Association and before Senior trial advocacy classes at South Texas College of Law on the topic of trial notebook and pre-trial investigation.


He has practiced criminal defense from day one. He is a member of the Austin Criminal Defense Lawyers Association, the Texas Criminal Defense Lawyers Association, the Criminal Law Section of the State Bar of Texas, the College of the State Bar of Texas and the National College of DUI Defense. John is a Certified Practitioner, in the Standard Field Sobriety Tests in accordance with the National Highway Safety Administration (NHTSA) and is a Certified Breath Test Operator and Maintenance Technician on the Intoxilyzer 5000 (the Intoxilyzer presently used in Texas) in accordance with United States Department of Transportation.


Basically, John has been on both sides of the street, and it is this diverse background that makes him uniquely qualified to help you or your loved one.


Practice areas


  1. DUI & DWI: 45%
    26 years
  2. Criminal Defense: 35%
    26 years
  3. Family: 20%
    26 years



Hourly ($175-250/hour), Fixed (always), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

6 total 

Are you an attorney? Endorse this lawyer

  • Michael S. Waddington

    I endorse John. He is a highly skilled attorney that is well respected in the legal community.


    Michael Waddington Military law Attorney
    Relationship: Fellow lawyer in community

  • Neil Michael Sicarelli

    I often turn to John with out of the ordinary DWI questions. He has the experience and knowledge to always point me in the right direction on a complex case.


    Neil Sicarelli Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

PO Box 6885
Round Rock, TX, 78683-6885


TXEligible To Practice In Texas 198908/17/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
AV Peer Review RatingMartindale-Hubbell2013
AV Peer Review RatingMartindale-Hubbell2012
AV Peer Review RatingMartindale-Hubbell2011
AV Peer Review RatingMartindale-Hubbell2010
AV Peer Review RatingMartindale-Hubbell2009
AV Peer Review RatingMartindale-Hubbell2008
AV Peer Review RatingMartindale-Hubbell2007
Work experience
TitleCompany nameDuration
Associate AttorneyLaw Office of Jamie Balagia, PC.2013 - Present
Director, Business/Paralegal StudiesVirgina College At Austin2008 - 2012
Sole PractitionerJohn W. Armstrong, Attorney At Law1990 - 2014
Association namePosition nameDuration
Ausitn Criminal Defense Lawyers AssociationMember2012 - Present
Williamson County Criminal Defense Lawyers AssociationMember, Board Secretary2012 - Present
Williamson County Bar AssociationMember2007 - Present
National College of DUI DefenseMember2005 - Present
Texas Criminal Defense Lawyers AssociationMember2001 - Present
State Bar of Texas, Criminal Justice SectionMember1989 - Present
Legal cases
Case nameOutcome
State v. IveyNot-guilty
See all legal cases 
School nameMajorDegreeGraduated
South Texas College of LawDoctor of Jurisprudence/Juris Doctor (J.D.)JD - Juris Doctor1989
Speaking engagements
Conference nameTitleDate
Williamson County Bar AssociationPre-Trial Discovery2011
Top Gun DWI SeminarPre-Trial Discovery2011
Luncheon SeminarInvestigating the Players Without Leaving the Office2005
3rd Annual Top Gun SeminarOpen Records Requests, Subpoenas, Updated2005
Criminal Trial Advocacy ClassTrial Notebook2004
2nd Annual Top Gun DWI SeminarOpen Records Requests and Subpoenas2004
Luncheon SeminarDWI Trial Notebook2002
Basic Peace Officer ClassesTexas Penal Code; Texas Code of Criminal Procedure, Arrest, Search and Seizure; Use of Force; Family Code, United States and Texas Constitutions; Ethics, and Civil Process and Liability.1999
Northeast College, Criminal Justice ProgramCriminal Investigation, The Criminal Justice System, Criminal Procedure, and Introduction to Criminal Law.1998
Volunteer Speaker's BureauGeneral practice of law, the area of criminal defense, necessary educational experience to prepare for the study and practice of law.1994
Basic Peace Officer TrainingCourtroom Demeanor and Testimony and Rules of Evidence.1982