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About me

Former expert witness in Breath Testing and Field Sobriety Tests turned crminal defense lawyer, Jeff Sifers bases his law practice in Oklahoma City while serving all of Oklahoma.  Mr. Sifers practice has a distinct focus in the defense of those persons accused of Driving Under the Influence, but also extends to serve those people who have been accused by the government of committing other crimes.  The Sifers Defense Firm has a singular guiding principle at its root:  That all people who have been accused of a crime are innocent until PROVEN guilty.  Mr. Sifers' firm works to perserve the client's rights by holding the government to their burden of proof, and making sure that a plea of guilt is the very last option - not the first or only.


Photos and videos

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Practice areas


  1. DUI & DWI: 85%
    10 years
  2. Criminal Defense: 15%
    10 years



Fixed (sometimes), Free consultation (45 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

13 total 

Are you an attorney? Endorse this lawyer

  • Michael S. Waddington

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


    Michael Waddington Military law Attorney
    Relationship: Fellow lawyer in community

  • Christopher Daniel Leroi

    Mr. Sifers is an exceptional attorney. Although I have been practicing law for 24 years as a judge, magistrate, law professor, prosecutor, and private attorney, I learn from his responses on Avvo every time that he posts. If I needed an attorney, I would hire him. I recommend him with no reservation. It would be the best investment of your life to hire him to represent you.


    Christopher Leroi Mediation Attorney
    Relationship: Fellow lawyer in community

Contact info

228 Robert S. Kerr
Suite 950
Oklahoma City, OK, 73102


OKAuthorized to practice law200604/19/2010
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarsSuper Lawyers Magazine2011
Work experience
TitleCompany nameDuration
PartnerThe Sifers Law Firm2006 - Present
Association namePosition nameDuration
Oklahoma County Bar AssociationMember2007 - Present
National College of DUI DefenseMember2006 - Present
Oklahoma Bar AssociationMember2006 - Present
Oklahoma County Criminal Defense Lawyers AssociationMember2006 - Present
National Association of Criminal Defense LawyersMember2006 - Present
Oklahoma Criminal Defense Lawyers AssociationSustaining Member2000 - Present
Legal cases
Case nameOutcome
State of Oklahoma v. CC.18 Breath Test DUI Amended to Public Drunk
State of Oklahoma v. KSDUI Refusal with 35 minute bad video = Not guilty
State of Oklahoma v. KSSame client (KS) - We'll get him now...or not...
See all legal cases 
Publication nameTitleDate
The GauntletPoints for Driving Violations2009
School nameMajorDegreeGraduated
Oklahoma City University School of LawN/AJD - Juris Doctor2005
University of PhoenixN/AOther - Bachelors2002
Speaking engagements
Conference nameTitleDate
DUI in OklahomaBlood Tests in DUI Cases2011
DUI in OklahomaDrug Recognition Experts2011
Mastering Scientific Evidence XVIIBreath Testing - The Intoxilyzer 50002010
Boiling Springs Legal InstituteEvidential Considerations in a DUI Drugs Arrest2010
Oklahoma Municipal Judges AssociationBreath Testing Basics - The Intoxilyzer 5000 & 80002009
Strategies in Defending DWI & DUI Cases in OklahomaStandardized Field Sobriety Tests - A Primer for Success2008
Stuart Kinard Memorial Advanced DWI SeminarIntoxilyzer 50002007
Oklahoma Bar Association’s Annual MeetingHow to Handle a “Basic” DUI in Oklahoma2007
DWI Means Defend With IngenuityExample Cross Examination of the Standardized Field Sobriety Test Officer2007
Ohio Advanced DUI SeminarBreath Testing - Intoxilyzer 50002006
Mastering Scientific Evidence XIVBreath Testing - Intoxilyzer 50002006
Custer County (Oklahoma) Bar Association Annual MeetingThe Intoxilyzer 5000-D2005
Oklahoma Criminal Defense Lawyers Annual DUI SeminarBreath Testing Technologies2004
Oklahoma County Criminal Defense Lawyers Association Lunch Seminar SeriesThe Drug Recognition Evaluation (“DRE”)2004
2nd Annual – Master Techniques for DUI CasesStandardized Field Sobriety Tests2003
“Top Gun DWI Defense”The Intoxilyzer 50002002
Oklahoma Municipal Judges ConferenceStandardized Field Sobriety Tests, “An Introduction To Tests You Will Never Pass”2002