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Katherine Lynn F. Mason

Katherine Lynn F. Mason

Practice areas:

Workers Compensation, Social Security, Lawsuits & Disputes

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About Me

Greetings: I proudly represent people who have been injured on the job, or who have become ill due to occupational exposures. I do not represent corporations or insurance companies. In addition to my workers' compensation cases, I also help people in coverage disputes with private disability carriers and in appeals from denials of Social Security Disability applications.


Languages Spoken: Spanish

Practice Areas

Licensed since 1999

  1. Workers Compensation: 85%
  2. Social Security: 10%
  3. Lawsuits & Disputes: 5%



Free Consultation (30 minutes)

Attorney Endorsements

5 total 

  • Amie Christine Peters

    Katherine is a compassionate advocate. She approaches her clients with respect and compassion, while still being an aggressive advocate for their rights in court. I highly recommend Katherine.


    Amie Peters Workers Compensation Attorney
    Relationship: Fellow lawyer in community

  • Roxanne Eberle

    Katherine Mason is smart and committed workers compensation attorney. I refer people to her for workers compensation cases because I do not practice in that area of law and I know that she will take good care of them. She is a quality lawyer with the highest ethics - putting her clients' interests even above her own. You could not do better than have Katherine Mason in your corner.


    Roxanne Eberle Personal Injury Attorney
    Relationship: Fellow lawyer in community

Contact Info

Law Offices of Katherine L. Mason, PLLC

919 NE 71st Street
Seattle, WA, 98115-5634




Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.

Avvo Contributions

Legal Answers


Award NameGrantorDate Granted
Rising Star - Workers' CompensationWashington Law & Politics Magazine2011
Rising Star -- Workers' CompensationWashington Law & Politics Magazine2009
Rising Star -- Workers' CompensationWashington Law & Politics Magazine2007
Rising Star -- Workers' CompesnationN/A2006
Rising Star -- Workers' CompensationN/A2005

Work Experience

TitleCompany NameDuration
OwnerLaw Offices of Katherine L. Mason2007 - Present
AssociateCausey Law Firm2002 - 2006
AssociateMcIntyre & Barns2000 - 2002
Assistant Attorney GeneralAttorney General of Washington1999 - 2000


Association NamePosition NameDuration
Washington State Association for JusticeChair -- Workers' Compensation Section2009 - 2010
WSTLA- Workers' Compensation SectionVice Chair2008 - 2009
American Association for JusticeMember2005 - Present
King County Bar AssociationMember2003 - Present
Washington State Trial Lawyers AssociationEagle Member2002 - Present


Publication NameTitleDate
Trial News (Washington State Trial Lawyers Association)Editor-in-Chief2011
WSAJ Trial NewsAssoicate Editor2010
WSAJ Workers' Compensation DeskbookChapter Written: FAQ's for Workers' Compensation2009
WSTLA Trial NewsIncreased ESD and DLI Data Sharing - A Trap for the Unwary 2006
Kansas Trial Lawyers AssociationTrauma and Multiple Sclerosis: Solid Evidence Trumps Frye Defense on Casual Relationship Issues2003
Workers First Watch Trauma & Multiple Sclerosis ...2003
WSTLA Trial NewsThe Trafficking of Counterfeit Prescription Drugs: The Real Story N/A


School NameMajorDegreeGraduated
Chicago-Kent College of Law Illinois Institute of TechnologyLawJD - Juris Doctor1999
Central Washington UniversityEnglishMasters1995
Central Washington UniversityEnglish & PhilosophyBA - Bachelor of Arts1993

Speaking Engagements

Conference NameTitleDate
Annual Workers' Comp. CLEVocational Disputes with DLI2010
WSTLA- Workers' Compensation CLEGetting Provisional Time Loss Benefits Paid2008
WSTLA Workers' Comp CLEEthics & Medical Records2007
Medical RecordsMedical Records and Litigation2007
WSTLA Workers' Comp CLEPitfalls Arising Out of the New DLI/Employment Security Computer Link2006
WSTLA Employment Law CLEWhen Unemployment & Workers' Compensation Collide2006
Workers' Compensation Case Preparation TechniquesCase Preparation Strategies and Ethics2006
WSTLA Workers' Comp CLEDiscovery Tools at the Board: Requests for Admissions2004
Advanced Legal Drafting for Washington ParalegalsDrafting Legal Documents and Pleadings2004
Neighborhood Legal Clinics Training 2003-2006Introduction to Workers' Compensation2003
Law Day 2002 - 2007Pre-Law School Preparation and Expectations2002