Halling & Cayo, S.C.


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Mark E Sanders

Mark E. Sanders

Phone: (414) 271-3400
Fax: (414) 271-3841
E-mail: [email protected]

Areas of Practice:

Litigation Percentage:

  • 100% of Practice Devoted to Litigation

Bar Admissions:

  • Wisconsin, 1981
  • U.S. Federal Courts, 1981
  • U.S. District Court Eastern District of Wisconsin
  • U.S. District Court Western District of Wisconsin
  • U.S. Court of Appeals 7th Circuit, 1985

Mark E. Sanders devotes his practice primarily to representing investors arbitrating securities disputes and individuals involved in family law disputes. For over twenty years, Mark has represented investors in arbitrations before the National Association of Securities Dealers (NASD) and the New York Stock Exchange (NYSE). The disputes arbitrated have included securities fraud, violations of state and federal securities laws, unsuitable investments, unlicensed trading, churning, breach of fiduciary duty and failure to timely execute trades. Mark has served as an arbitrator for the NASD and National Futures Association (NFA). He is a member of the Public Investors Arbitration Bar Association (PIABA) and the litigation sections of both the American Bar Association (ABA) and State Bar of Wisconsin.

Mark has also practiced in the area of family law for over 20 years. He has represented parties in all of the counties of Southeastern Wisconsin in cases involving divorce, legal separation, child support, custody, maintenance, property division and paternity. He has been appointed and served as a guardian ad litem for the minor children in custody disputes. He is a member of the Society of Family Lawyers and the Family Law Sections of the ABA, the Milwaukee Bar Association and the Wisconsin State Bar. He is a past President of the Leander J. Foley, Jr. Matrimonial Chapter of the American Inns of Court.

Mark received his law degree from the University of Michigan where he graduated magna cum laude in 1980. He received his BA and his MS (in Computer Science) from the University of Wisconsin. He is admitted to practice in the Wisconsin State Courts and the Federal District Courts for the Eastern and Western Districts of Wisconsin, and the Federal Court of Appeals for the Seventh Circuit.


  • The University of Michigan Law School, Ann Arbor, Michigan, 1980
    J.D., Doctor of Jurisprudence
    Honors: Magna Cum Laude
  • University of Wisconsin
  • University of Wisconsin
    Major: Computer Science

MKE Lifestyle named Mark in their “Best Lawyer” 2020 issue, recognizing him as one of the Best Lawyers in Wisconsin as it pertains to Family Law.

Professional Associations and Memberships:

  • Public Investors Arbitration Bar Association (PIABA), Member
  • American Bar Association, Litigation Section, Member
  • State Bar of Wisconsin, Litigation Section, Member
  • ABA, Society of Family Lawyers Section, Member
  • ABA, Family Law Section, Member
  • Milwaukee Bar Association, Member
  • Wisconsin State Bar, Member
  • Leander J. Foley, Jr. Matrimonial Chapter of the American Inns of Court, Past President