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Margaret H Leek Leiberan

About me

Over thirty years experience handling appeals before the Oregon Court of Appeals and Oregon Supreme Court in all areas of the law other than criminal.  My practice includes, but is not limited to  cases in the following areas of the law: civil, tort, family law (divorce, dissolution of registered or unregistered domestic partnership, property distribution, spousal support (alimony), custody, parenting time, child support) contract, business law, elder law, animal rights, commercial landlord tenant, land use,  and adminstrative law.  I am very experienced in legal research,  writing lengthy briefs in sometimes very complex matters and effective oral argument to the court.   I pride myself on making sure that my client's story is told to the court persuasively, completely and with the most persuasive legal argument possible.


Photos and videos

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Practice areas


  1. Appeals: 100%
    37 years, 500 cases



Retainer (always)

Payment types:

Cash, Check, Credit card

Attorney endorsements

8 total 

Are you an attorney? Endorse this lawyer

  • Christian K. Lassen II

    Top-notch attorney. Highly respected in the legal community.


    Christian Lassen Personal injury Attorney
    Relationship: Fellow lawyer in community

  • James Adam Vickman

    I endorse this lawyer. Margaret Leiberan is an excellent appellate attorney. I am a California lawyer and represented some individuals from California who were being sued in Oregon. Plaintiff obtained a verdict and an appeal was necessary. Ms. Leiberan did fantastic appellate work on the matter, from both a substantive and technical standpoint.


    James Vickman Litigation Attorney
    Relationship: Worked together on matter

Contact info

Jensen & Leiberan

One Lincoln Center
10300 SW Greenburg Rd., Suite 300
Portland, OR, 97223


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
AV Peer Review Rated Every Year 1990 to presentMartindale Hubbell2013
Bar Register of Preeminent Lawyers Every Year 2007 to PresentMartindale-Hubbell2013
Professional of the Year in Legal ServicesWho's Who2013
Legal Professional of the YearWho's Who of Executives and Professionals2013
Work experience
TitleCompany nameDuration
OwnerJensen & Leiberan2007 - Present
AssociateMason & Associates2005 - 2007
AssociateCase & Dusterhoff, LLP2004 - 2005
Sole PractitionerMargaret H. Leek Leiberan, attorney at law1988 - 2005
AssociateKell, Alterman & Runstein1985 - 1988
Staff AttorneyCourt of Appeals1983 - 1985
PartnerMitchell, Lang & Smith1981 - 1982
AssociateLang, Klein, Wolf, Smith, Griffith & Hallmark1978 - 1981
AssociateEngel, Keller & Pomajevich1976 - 1977
Association namePosition nameDuration
Oregon Appellate Court Rules CommitteeMember2010 - Present
Oregon State BarN/A1977 - Present
Appellate Law Section, Oregon State BarN/AN/A
Washington County Bar AssociationN/AN/A
Multnomah Bar AssociationN/AN/A
Clackamas County Bar AssociationN/AN/A
Legal cases
Case nameOutcome
Jensen v. BevardCustody of child returned to mother.
Keller and KellerDismissal of contempt case reversed and remanded
Wilson v. Walluski Western LtdCourt of Appeals upheld jury verdict for employer
See all legal cases 
School nameMajorDegreeGraduated
Harvard University Law SchoolLawJD - Juris Doctor1976
University of OregonPoltical ScienceOther - Bachelors1973
Albany Union High School, OregonN/AHigh School Diploma1968
Speaking engagements
Conference nameTitleDate
Multnomah County Bar MeetingPracticing as an Appellate Lawyer in a Small Law Firm2009