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About me

George C. Mastrodonato, a principal, joined Carney Badley Spellman in April 2010. Mr. Mastrodonato was previously a partner in the Seattle office of Dorsey & Whitney LLP, and a shareholder in both the Olympia and Seattle offices of Lane Powell PC. His practice focuses on Washington state and local taxes. He represents a diverse group of clients in a wide variety of industries, including forest products, utilities, manufacturing and refining, wholesale trade and transportation. His clients include large and small businesses, individuals, and municipal corporations. He has handled state and local tax issues before administrative agencies (Washington Department of Revenue, county boards of equalization, State Board of Tax Appeals) and the courts (Superior Court, Court of Appeals, Supreme Court). He was previously employed for more than eleven years by the Department of Revenue, working in tax appeals, legislation, rules and taxpayer information and education.


Practice areas


  1. Tax: 100%

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Contact info

Carney Badley Spellman, PS

701 Fifth Avenue, Suite 3600
Seattle, WA, 98104


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Super LawyerSuper Lawyers Magazine2013
Best Lawyer, TaxBest Lawyers in America2013
Best Lawyer, TaxBest Lawyers in America2012
Super LawyerSuper Lawyers Magazine2012
Best Lawyer, TaxBest Lawyers in America2011
Super LawyerSuper Lawyers Magazine2011
Super LawyerSuper Lawyers Magazine2010
Best Lawyer, TaxBest Lawyers in America2010
Super LawyerSuper Lawyers Magazine2009
Best Lawyer, TaxBest Lawyers in America2009
Super LawyerSuper Lawyers Magazine2008
Best Lawyer, TaxBest Lawyers in America2008
Work experience
TitleCompany nameDuration
ShareholderCarney Badley Spellman, PS2010 - Present
Association namePosition nameDuration
Washington State Bar Association, Taxation Law SectionPast President1996 - 1997
Washington State Bar Association, Taxation Law SectionPresident1995 - 1996
Washington State Bar Association, Taxation Law SectionSection Officer1992 - 1996
Washington State Bar Association, Taxation Law Section, Liason and Administration CommitteeMember1988 - 1991
Legal cases
Case nameOutcome
Clark County Public Utility District No. 1 v Dep't of Revenue, 153 Wn App 737, 222 P3d 1232 (2009)N/A
Activate, Inc v Dep't of Revenue, 150 Wn App 807, 209 P3d 524 (2009)N/A
Tesoro Refining and Marketing Co v Dep't of Revenue, 164 Wn 2d 310, 190 Ped 28 (2008)N/A
See all legal cases 
School nameMajorDegreeGraduated
Gonzaga University School of LawLawJD - Juris Doctor1976
Syracuse UniversityN/ABA - Bachelor of Arts1972
Speaking engagements
Conference nameTitleDate
20th Annual Washington Construction LawKey State Tax Considerations for Construction Projects2013
57th Annual Estate Planning SeminarWashington Tax Issues Associated with Transfers of Property2012
2012 Sales & Use Tax SymposiumNon-Traditional Tax Issues - Washington2012
King County Bar Association, Real Property, Probate and Trust SectionWashington's New Real Estate Excise Tax Regulations2006