John W. Klinker is an associate attorney at Peck Ritchey, LLC. In addition to representing individuals and families, John represents financial institutions, medical institutions and various fiduciaries.

John earned his Juris Doctor from The Loyola University Chicago School of Law, where he graduated cum laude as well as earned certificates in trial advocacy and public interest law.* During Law school, John was regularly named to the Dean’s List and received CALI awards for excellence in Advocacy and Advanced Legal Writing for Illinois Civil and Criminal Litigation. He also served as the Managing Editor of The Loyola University Chicago Law Journal, competed on the ABA Negotiation Team, served as an academic tutor for a Property Law course and was inducted into Alpha Sigma Nu (the National Jesuit Honor Society).

John’s practice areas include Trust and Probate Litigation, Guardianship Litigation and Administration, Estate Administration, Will Contests, Fiduciary Defense Litigation, and Elder Law. He is an active member of the Chicago Bar Association.

*“The Supreme Court of Illinois does not recognize certifications of specialties in the practice of law and certificates, awards or recognitions are not a requirement to practice law in Illinois.”

Practice Areas

  • Trust and Probate Litigation
  • Guardianship Litigation and Administration
  • Estate Administration
  • Fiduciary Defense Litigation
  • Elder Law


  • The Loyola University Chicago School of Law, J.D. Cum Laude
  • Loyola University Chicago BA Political Science Cum Laude
  • Loyola University Chicago BSW Cum Laude

Bar Admission

  • Illinois

Professional Associations

  • Chicago Bar Association
  • American Bar Association
  • Catholic Lawyers Guild of Chicago
  • Loyola University Chicago School of Law Young Alumni Events Committee