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About me


I bring a hard working attitude and sense of fairness that shows my commitment to getting the best results possible for my clients. I graduated magna cum laude from Washington State University. In 2005 I graduated magna cum laude from Gonzaga Law School. After working for a year as a prosecutor, I have been practicing in civil litigation since 2006 where I focus primarily on helping individuals and families affected by injuries caused by others.  I have been a trial attorney my entire legal career, first prosecuting crimes, then as an insurance defense attorney, and now representing people injured by the negligence of others. I currently handle persona injury cases in Kennewick, Richland, Pasco, Walla Walla, and the Yakima valley.



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Contact info

Harkins Swinburnson & Wagar, PLLC

5724 W Clearwater Ave.
Kennewick, WA, 99336

Practice areas


  1. Car Accident: 25%
  2. Personal Injury: 20%
    3 years
  3. Wrongful Death: 15%
  4. Social Security: 15%
  5. Other: 25%
  6. More 



Contingent (33%)

Payment types:

Cash, Check

Attorney endorsements

4 total 

Are you an attorney? Endorse this lawyer

  • Jared David Paulsen

    Mariah is professional and well respected in the legal community. I endorse this lawyer.


    Jared Paulsen Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Jeffrey Martin Kreutz

    I endorse this lawyer. Mariah is an outstanding advocate for her clients.


    Jeffrey Kreutz Personal injury Attorney
    Relationship: Fellow lawyer in community


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
2013 Super Lawyers Rising StarWashington Super Lawyers2013
2012 Super Lawyers Rising StarWashington Super Lawyers2012
Work experience
TitleCompany nameDuration
PartnerHarkins Swinburnson & Wagar, PLLC2014 - Present
AttorneyFlynn Merriman McKennon, PS2012 - Present
PartnerMiller, Mertens, Comfort, Wagar & Kreutz, PLLC2006 - 2012
Deputy Prosecuting AttorneyBenton County Prosecuting Attorney's Office2005 - 2006
Association namePosition nameDuration
J. Reuben Clark Law Society (Columbia River Chapter)President2013 - Present
United States District Court for the Eastern District of WashingtonMember2006 - Present
Washington State Bar AssociationMember2005 - Present
Washington State Association for JusticeCo-Chair of Tri-Cities Roundtable2013 - 2014
Kennewick High School Mock Trial TeamCoach2012 - 2013
Legal cases
Case nameOutcome
Chronic Beryllium Worker's Comp CaseClaim accepted
Car Accident Involving Pregnant Mother$175,000
Traumatic Brain Injury Settlement$3.5 Million
See all legal cases 
School nameMajorDegreeGraduated
Gonzaga University School of LawLawJD - Magna Cum Laude2005
Washington State UniversityN/ABA - Magna Cum Laude2002
Speaking engagements
Conference nameTitleDate
Where there's a Will, there's a WayEstate Planning2012