Atty. Michael R. O'Callaghan

Atty. Michael R. O'Callaghan

Atty. Michael R.

Madison Madison 17 yrs experience 17 year
Call (608) 218-3579 Book Appointment

Profile Summary

About Michael R. O'Callaghan at a glance

Michael R. O'Callaghan is a Member based in Madison, Wisconsin, practicing at Hazelbaker & Associates, S.C.. They have 17+ years of legal experience, licensed to practice since 2009. Admitted to practice in Wisconsin (2009). Educated at University of Wisconsin Law School (J.D., 2008). Serands clients in Madison, WI and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Atty. Michael R. O'Callaghan is a lawyer
  • Michael has been licensed for 17 years
  • Michael practices at Hazelbaker & Associates, S.C. in Madison, WI

Jurisdictional Context

Why local counsel matters in Wisconsin

Practicing law in Wisconsin. Legal matters in Wisconsin are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Madison are typically filed in the local municipal court or the appropriate Wisconsin state district court, depending on subject matter and amount in controversy. An attorney licensed in Wisconsin brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Wisconsin courts without local counsel or pro hac vice admission.

Looking for additional Wisconsin attorneys? Browse all attorneys in Madison or all attorneys in Wisconsin.

Frequently Asked

Common questions about Michael R. O'Callaghan

Where is Michael R. O'Callaghan's law office located?
Michael R. O'Callaghan's law practice is located in Madison, Wisconsin. The firm is Hazelbaker & Associates, S.C.. You can contact the office directly through this profile page.
How long has Michael R. O'Callaghan practiced law?
Michael R. O'Callaghan has 17+ years of legal experience and has been licensed since 2009.
Where did Michael R. O'Callaghan go to law school?
Michael R. O'Callaghan earned their education at (J.D., 2008).
How can I contact Michael R. O'Callaghan for a consultation?
You can contact Michael R. O'Callaghan directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
University of Wisconsin Law School
- 2008

Bar Admissions

Wisconsin
Admitted: 2009

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