Margarita A. Castaneda

Tel | 414.276.5000




  • Marquette University Law School (cum laude)
  • West Virginia University (B.S., with distinction)

Margarita A. Castaneda

Margarita is a member of the Tax Advice, Planning, and Controversy, Estate and Succession Planning, and Inheritance Litigation and Will Contest Practice Groups. She assists clients in all matters relating to estate planning, succession planning, and trust administration. Additionally, Margarita contributes across practice groups including the Litigation, Business Law, and Real Estate Law Practice Groups, to help solve a wide range of legal issues. Margarita is a graduate of Marquette University and was a judicial intern for the United States Court of Appeals for the Seventh Circuit.

Margarita Assists Clients With

  • Estate planning for families
  • Reviewing and amending existing estate plans
  • Drafting and revising contractual documents
  • Inheritance litigation

Forms Library

Experience/Representative Client Work

  • Law Clerk, O’Neil, Cannon, Hollman DeJong & Laing
  • Judicial Intern, United States Court of Appeals for the Seventh Circuit
  • Student Mediator, Marquette University Law School Small Claims Mediation Clinic

Professional Associations & Affiliations

  • Member, Wisconsin State Bar


  • Dean’s List, Marquette University Law School
  • Dean’s List, West Virginia University
  • Comment Editor, Marquette Law Review
  • Pro Bono Honor Society, Marquette University Law School
  • Member, Alpha Sigma Nu