Atty. Sean Lanphier

Atty. Sean Lanphier

Atty. Sean Lanphier is a lawyer practicing litigation, nasd arbitration, appellate practice.

Milwaukee Milwaukee 41 yrs experience 41 year
Call (414) 326-4639 Book Appointment

Profile Summary

About Sean Lanphier at a glance

Sean Lanphier is a Shareholder based in Milwaukee, Wisconsin. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on litigation, adr, and appellate. Admitted to practice in New York (1985), Wisconsin (1986), U.S. District Court, Eastern District of Wisconsin (1986), and U.S. District Court, Western District of Wisconsin (1986). Educated at Washington University (J.D., 1984) and University of Wisconsin-Milwaukee (B.A. New, 1976). Recognitions include AV Preeminent. Serands clients in Milwaukee, WI and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Atty. Sean Lanphier is a lawyer practicing litigation, nasd arbitration, appellate practice
  • Sean received a B.A. degree from University of Wisconsin-Milwaukee in 1976, and has been licensed for 41 years
  • Sean practices in Milwaukee, WI

Practice Areas Explained

Sean Lanphier's Areas of Practice

Each practice area below reflects the types of cases Sean Lanphier handles, with a brief overview of what that area of law covers.

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Sean Lanphier is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Wisconsin →

Mediation & Arbitration

Mediators and arbitrators for civil, commercial, family, and employment dispute resolution.

Sean Lanphier is one of 73,906 adr attorneys indexed nationally. Browse adr attorneys in Wisconsin →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Sean Lanphier is one of 86,319 appellate attorneys indexed nationally. Browse appellate attorneys in Wisconsin →

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 Milwaukee 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 Milwaukee or all attorneys in Wisconsin.

Frequently Asked

Common questions about Sean Lanphier

Where is Sean Lanphier's law office located?
Sean Lanphier's law practice is located in Milwaukee, Wisconsin. You can contact the office directly through this profile page.
What practice areas does Sean Lanphier handle?
Sean Lanphier focuses on litigation, adr, appellate. Each practice area listed reflects experience handling cases of that type in Wisconsin.
How long has Sean Lanphier practiced law?
Sean Lanphier has 41+ years of legal experience and has been licensed since 1985.
Where did Sean Lanphier go to law school?
Sean Lanphier earned their education at (J.D., 1984); (B.A. New, 1976).
How can I contact Sean Lanphier for a consultation?
You can contact Sean Lanphier 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.
What awards or recognition has Sean Lanphier received?
Sean Lanphier's notable recognition includes: AV Preeminent.

Education

J.D.
Washington University
- 1984
B.A. New
University of Wisconsin-Milwaukee
- 1976

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1985
Wisconsin
Admitted: 1986
U.S. District Court, Eastern District of Wisconsin
Admitted: 1986
U.S. District Court, Western District of Wisconsin
Admitted: 1986

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