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About Me

I am a Seattle native born and raised.  I attended the University of Washington and received a BA in Psychology.  


I have been licensed to practice law for over 10 years and love what I do for a living.  


Languages Spoken: Korean

Practice Areas


  1. DUI & DWI: 80%
    13 years
  2. Criminal Defense: 20%
    13 years



Free Consultation (60 minutes)

Payment Types:

Check, Credit Card

Attorney Endorsements

29 total 

  • Michael S. Waddington

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


    Michael Waddington Military Law Attorney
    Relationship: Fellow lawyer in community

  • Sarah D Cho

    David O zealously advocates on behalf of his clients and is incredibly personable, which is important when negotiating with prosecutors. I highly recommend David.


    Sarah Cho DUI & DWI Attorney
    Relationship: Fellow lawyer in community

Contact Info

David O Defense

2211 Elliott Avenue
Suite 200
Seattle, WA, 98121



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Washington 2010 Rising StarWashington Law & Politics Magazine2010
Pro Bono Publico Service CommendationWashington State Bar Association2009
Pro Bono Publico Service CommendationWashington State Bar Association2008
Pro Bono Publico Service CommendationWashington State Bar Association2007
Work Experience
TitleCompany NameDuration
Attorney at Law/ PrincipalDavid O Defense, PLLC2008 - Present
Associate AttorneyBradley Johnson Attorneys2004 - 2008
N/ANorthwest Defenders Association2003 - 2004
Association NamePosition NameDuration
Citizens for Judicial ExcellenceMember2008 - Present
Joint Asian Judicial Evaluations CommitteeBoard Member for the Bylaws Committee2008 - 2010
King County Pro Bono ClinicCoordinator2007 - 2009
National Association of Criminal Defense LawyersMember2006 - Present
Washington Association of Criminal Defense LawyersMember2004 - Present
Korean American Bar AssociationBoard Member2004 - 2010
Washington Association of Criminal Defense LawyersMember2002 - Present
King County Bar AssociationMember2001 - Present
Legal Cases
Case NameOutcome
DUI case dismissedDismissed
See all Legal Cases 
School NameMajorDegreeGraduated
Oklahoma City University School of LawN/AJuris Doctorate2001
University of WashingtonN/APsychology1998