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Diane K. O'Connor

Diane K. O'Connor

This attorney is not accepting clients.

Reason: Not Practicing

About me

Ms. Diane K. O'Connor is a graduate of Smith College and Marquette University Law School.  She received certificates in Trust Administration from Northwestern University and Advanced Estate Planning from the American College. Attorney O'Connor is a Fellow of the American College of Trust and Estate Counsel, and a member of the Wisconsin and Milwaukee Bar Associations.  She is a Past Chair and Director of the State Bar Real Property, Probate and Trust Section and past Director of the Milwaukee Estate Planning Council. She has been a member of the State Bar committees on Marital Property Reform and Probate Code Reform and is a past member of the Wisconsin Trustees Association and Estate Counselors Forum. She is currently listed with Milwaukee Super Lawyers and Best Lawyers in America.  Ms O'Connor retired from practice in 2013.


Practice areas

  1. Estate Planning: 40%
    40 years
  2. Trusts: 30%
    40 years
  3. Probate: 30%
    40 years



Retainer (sometimes)

Payment types:

Cash, Check

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • Stephanie G. Rapkin

    I endorse this lawyer. Diane has been a good mentor and colleague to me.


    Stephanie Rapkin Estate planning Attorney
    Relationship: Fellow lawyer in community

Contact info

O'Connor & Sachs LLP

1461 E Goodrich Ln apt
Milwaukee, WI, 53217-2950


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Best Lawyers in AmericaBest Lawyers in America2010
Top Lawyers 2010 Milwaukee AreaThe Business Journal2010
Best Lawyers in AmericaBest Lawyers in America2009
Best Lawyers in AmericaBest Lawyers in America2008
Milwaukee Super LawyersMilwaukee Magazine2007
Best Lawyers in AmericaBest Lawyers in America2007
AV rated Martindale-HubbellMartindale-Hubbell1993
Work experience
TitleCompany nameDuration
PartnerO'Connor & Sachs, LLP1985 - Present
Trust Counsel/AuditorMilwaukee Western Bank1984 - 1990
AttorneyLaw Offices of Diane K. OConnor1983 - 1984
Vice PresidentMarshall & Ilsley Trust Company1976 - 1983
Association namePosition nameDuration
State Bar of WisconsinProbate and Trust Legislative Committee2009 - Present
Real Property Probate and Trust Section State Bar of WisconsinPast Chair1999 - Present
American College of Trust and Estate CounselMember1993 - Present
Milwaukee Estate Planning CouncilMember1979 - Present
State Bar of WisconsinN/AN/A
Ozaukee County Bar AssociationPast MemberN/A
Milwaukee Bar AssociationPast MemberN/A
Milwaukee Estate Planning Council, LTDPast DirectorN/A
Milwaukee Estate Counselors ForumPast MemberN/A
Committee on Probate Reform State Bar of WisconsinMember1995 - 2000
Real Property Probate and Trust Section State Bar of WisconsinPast Director1990 - 2000
Sisters of St. Francis Planned Giving CommitteeMember1980 - 1983
Committee on Marital Property Reform State Bar of WisconsinMember1979 - 1986
The Foundation ForumMember1979 - 1983
Marquette University Planned Giving CommitteeMember1978 - 1986
Committee on Guardianship Reform State Bar of WisconsinMember1977 - 1978
Wisconsin Trustee's AssociationMember1977 - 1982
Publication nameTitleDate
State Bar of Wisconsin Pamphlet SeriesRevisions to Wills, Trusts, Probate Pamphlets2000
Wisconsin's New Probate CodeChapter Editor1999
Estate Planning with Charitable Trusts Pamphlet SeriesEstate Planning with Charitable Trusts1988
Milwaukee Foundation NewsletterTax Aspects of Private Foundations1980
School nameMajorDegreeGraduated
The American CollegeAdvanced Estate PlanningN/A1979
Northwestern University Trust SchoolTrust Planning and AdministrationN/A1978
Marquette University Law SchoolN/AJD - Juris Doctor1976
Speaking engagements
Conference nameTitleDate
First Annual Wisconsin SSF Institute / 8th Annual Wisconsin Law & Technology InstituteSolo & Small Firm / Technology2006
Waukesha Bar AssociationUniform Probate Code: Article II Reforms for Wisconsin1999
State Bar CLE SeminarProbate Reform in Wisconsin1999
Racine County Bar AssociationSelected Changes in the New Wisconsin Probate Code1999
Milwaukee Bar AssociationUniform Probate Code Reforms for Wisconsin1999
State Bar CLE SeminarTrust Planning with Drafting Provisions1993