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About Me

Mr. Osborn’s practice focuses on plaintiffs’ personal injury, auto accidents, products liability, medical malpractice, and professional negligence, with recent settlements over $13.5 million. In 2010, King County paid Mr. Osborn a record 10,000,000 for an excessive force case. In 2009, the Washington Supreme Court upheld the $1.35 million jury verdict Mr. Osborn and his firm obtained in Armantrout v. Cascade Orthopaedics, affecting wrongful death claims in Washington. Mr. Osborn’s representation of children injured by magnet-containing toys brought toy safety to national attention and led to the recall of magnetic toys and the scrutiny and recall of toys with lead paint and other dangers. Mr. Osborn recently represented pro bono Stella Stansfield, a young girl whose life-saving medication was denied by DSHS. As well as being a member, Mr. Osborn also serves on the executive committe of the American Board of Trial Advocates. Mr. Osborn is a member of WSAJ, KCBA, and AAJ. He serves on the boards of several area youth programs and coached his Kirkland JV football team to a 10-1 record in the 2009 season.


Practice Areas


  1. Personal Injury: 75%
  2. Product Liability: 20%
  3. Medical Malpractice: 5%

Attorney Endorsements

6 total 

  • Sean A. Ayres

    I endorse Sim Osborn. Great advocate who cares for his clients.


    Sean Ayres Personal Injury Attorney
    Relationship: Fellow lawyer in community

  • Michael S. Waddington

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


    Michael Waddington Military Law Attorney
    Relationship: Fellow lawyer in community

Contact Info

Osborn Machler

2125 Fifth Avenue
Seattle, WA, 98121

Machler Osborne

2125 5th Avenue

Seattle, WA, 98121-2510




Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Super LawyerThomson Reuters2011
Top 100 Trial LawyersNational Trial Lawyers2011
Highest Rating in Legal Ability & Ethical StandardsLexisNexis Peer Review Rating (AV)2010
Top Lawyer As Chosen By PeersSeattle Met Magazine: 100 Reasons to Love Seattle2010
Super LawyerThomson Reuters2010
Top 100 Trial LawyersNational Trial Lawyers2010
Top 100 Trial LawyersNational Trial Lawyers2009
Super LawyersThomson Reuters2009
Highest Rating in Legal Ability & Ethical StandardsLexisNexis Peer Review Rating (AV)2009
Top 100 Trial LawyersNational Trial Lawyers2008
Super LawyerThomson Reuters2008
Super LawyerThomson Reuters2007
Top 100 Trial LawyersNational Trial Lawyers2007
Bar Register Of Preeminent LawyersLexisNexis2007
Super LawyerThomson Reuters2006
Bar Register Of Preeminent LawyersLexisNexis2006
Bar Register Of Preeminent LawyersLexisNexis2005
Pro Bono Service CommendationWashington State Bar Association2005
Super LawyerThomson Reuters2005
Bar Register Of Preeminent LawyersLexisNexis2005
Bar Register Of Preeminent LawyersLexisNexis2004
Super LawyerThomson Reuters2004
Bar Register Of Preeminent LawyersLexisNexis2003
Super LawyerThomson Reuters2003
Bar Register Of Preeminent LawyersLexisNexis2002
Super LawyerThomson Reuters2002
Bar Register Of Preeminent LawyersLexisNexis2001
Super LawyerThomson Reuters2001
Listed Best Lawyers in America N/A2001
Bar Register Of Preeminent LawyersLexisNexis2000
Who's who in AmericaN/A2000
Board of GovernorsWestern Trial Lawyers Association2000
Super LawyerThomson Reuters2000
Who's who in American LawN/A1999
Work Experience
TitleCompany NameDuration
PartnerOsborn Machler2000 - Present
PartnerOsborn Law Firm1995 - 2000
PartnerKargianis and Osborn1990 - 1995
Of CounselKargianis, Austin and Erickson1986 - 1990
PartnerAnderson and Osborn1984 - 1986
Association NamePosition NameDuration
Outstanding Lawyers in AmericaMember2004 - Present
American Board of Trial AdvocatesExecutive Committee2003 - Present
Best Lawyers in AmericaMember2001 - Present
Western Trial Lawyers AssociationBoard of Governors2000 - 2001
N/AMember2000 - Present
Association of Trial Lawyers of AmericaMember1984 - Present
King County Bar AssociationMember1984 - Present
Washington State Association for JusticeMember1984 - Present
Washington State Bar AssociationMember1984 - Present
Legal Cases
Case NameOutcome
Armantrout v. Cascade OrthopaedicsA jury verdict of $1,350,000, appealed and upheld by the Washington State Supreme Court.
See all Legal Cases 
Publication NameTitleDate
On Your Own- Your Rights and ResponsibilitiesCredit1996
On Your Own-Your Rights and ResponsibilitiesConsumer Protection1990
School NameMajorDegreeGraduated
University of Puget Sound School of LawLawJD - Juris Doctor1984
Whitman CollegeHistoryBA - Bachelor of Arts1980
Speaking Engagements
Conference NameTitleDate
Proving DamagesDeveloping Plaintiff's Evidence2005
Evidence SeminarSpoiliation: Repercussions when the evidence is destroyed2003
Advanced Trial TacticsOpening Statements2003
Legends of LitigationLandowner Liability for Injuries Caused by Criminal Conduct in Parking Areas2000
Bridging the GapRepresenting the Plaintiff in a Civil Action1999
Bridging the GapRepresenting the Plaintiff in a Civil Action1998
Trying and Winning Your First TrialOpening Statements and Closing Arguments1997
SkimenderRepresenting the Professional Athlete-advise for life1991