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About me

An active attorney and inactive Certified Public Accountant, Mr. Waldbaum regularly represents clients before the Internal Revenue Service and the Washington Department of Revenue. He has more than thirty years of experience in the tax field.

Mr. Waldbaum joined LeSourd & Patten in 1971 and is a past president of the firm. He is also a past president of the Washington State Bar Association's Tax Section and a past director of the state chapter and national organization, the American Association of Attorney-Certified Public Accountants. He has served as chairman of the Internal Revenue Service liaison committees at both the district and regional levels. Listed as one of the Best Lawyers in America, Mr. Waldbaum is one of seven attorneys in Washington who is a Fellow of the American College of Tax Counsel and is repeatedly named as one of Washington's "Super Lawyers" by Washington Law & Politics. Seattle Magazine recognizes Mr. Waldbaum, based on a poll of over 5,000 King County attorneys, as one of the six "Best Tax Lawyers" in Seattle (one of the other five also being members of our firm).

He has published numerous articles on tax law and has spoken on tax issues before a wide variety of professional groups. He has extensive experience with Tax Court litigation, state and federal tax controversies, criminal tax defense, buying and selling businesses, and estate planning.


Practice areas


  1. Tax: 70%
  2. Business: 10%
  3. Probate: 10%
  4. Estate Planning: 10%

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • Craig S. Sternberg

    I endorse this lawyer. Rodney is among the top tax lawyers in the State of Washington. I have worked with him, and have watched him work on numerous matters. He gets great results for his clients.


    Craig Sternberg Bankruptcy and debt Attorney
    Relationship: Worked together on matter

Contact info

LeSourd & Patten, P.S.

One Union Square
600 University Street 24th Floor, Suite 2401
Seattle, WA, 98101


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Best Lawyers,Tax LawN/AN/A
Super LawyerN/AN/A
Best LawyerN/AN/A
AV RatingN/AN/A
Work experience
TitleCompany nameDuration
PartnerLeSourd & Patten, P.S.1971 - Present
Association namePosition nameDuration
Washington State Bar AssociationMemberN/A
American Association of AttorneysMemberN/A
American College of Tax CounselFellowN/A
Washington State Bar Association, Taxation Law SectionPast PresidentN/A
American Association of Attorney-CPAsPast National DirectorN/A
American Association of Attorney-CPAs, Washington State ChapterPast PresidentN/A
Publication nameTitleDate
Washington Lawyers Practice ManualPart Nine: Washington State Taxes of Chapter 11 "General Tax Practice"2006
Puget Sound Business JournalTax Collections Are Tightening Up On Enforcement2004
Puget Sound Business JournalSome Guidelines for Estate-Based Gifts1999
WSBA Taxation Section NewsletterTyler Pipe Industries and National Can vs. Department of Revenue1987
Washington Law ReviewTransfer of Decedant's Basis at Death: The Allocated Carryover Approach1970
School nameMajorDegreeGraduated
University of Washington School of LawLawJD - Juris Doctor1970
University of WashingtonN/ABS - Bachelor of Science1967
Speaking engagements
Conference nameTitleDate
Washington Association of Attorney/CPAs Education ProgramNew Rules for Theft Loss Deductions for Investments which turn out to be Ponzi Schemes2009
Third Annual Trust and Estate Litigation ConferenceFederal and State Estate and Gift Tax2006
Real Estate Law: Transactions SeminarTax Considerations in Real Estate Transactions2005
Federal and Washington Estate Tax Returns: Updates on Planning and Practical TipsThe Tax Factor: Procedures and Strategies on How to Approach Estate and Gift Litigation with the IRS2004
Lorman Education Services' Washington Sales and Use Tax SeminarUse Tax In Washington2002
Taxation For The General PractitionerRecent Developments in Federal Tax Legislation: What Do They Mean To The General Practitioner2002
Themis Incorporated Seminar: Employment Law Snap ShotsHow to Draft Settlements Around the Pending Taxation of Punatives Issue1996
Moss Adams 1995 Tax SeminarIssues of Importance to CPAs Engaged in the Practice of Estate Planning1995
WSBA Seminar on Dealing with the IRS in the 1990sCriminal Investigation Division1990