Atty. Michael J. Sullivan

Atty. Michael J. Sullivan

Mr. Michael J.

Casper Casper 62 yrs experience 62 year
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Profile Summary

About Michael J. Sullivan at a glance

Michael J. Sullivan is a Partner based in Casper, Wyoming, practicing at Lewis Roca Rothgerber Christie LLP. They have 62+ years of legal experience, licensed to practice since 1964. Their practice focuses on business, litigation, environmental, and adr. Admitted to practice in Wyoming (1964), U.S. District Court, District of Wyoming (1964), and U.S. Supreme Court U.S. Court of Appeals, Tenth Circuit (1980). Educated at University of Wyoming College of Law (J.D., 1964) and University of Wyoming (B.S. Petroleum, 1961). Recognitions include AV Preeminent. Serands clients in Casper, WY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. Michael J. Sullivan is a lawyer practicing alternative dispute resolution - arbitration/mediation, business representation, litigation and 2 other areas of law
  • Michael received a B.S. degree from University of Wyoming in 1961, and has been licensed for 62 years
  • Michael practices at Lewis Roca Rothgerber Christie LLP in Casper, WY

Practice Areas Explained

Michael J. Sullivan's Areas of Practice

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

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Michael J. Sullivan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Wyoming →

Civil Litigation

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

Michael J. Sullivan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Wyoming →

Environmental Law

Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

Michael J. Sullivan is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in Wyoming →

Mediation & Arbitration

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

Michael J. Sullivan is one of 73,906 adr attorneys indexed nationally. Browse adr attorneys in Wyoming →

Jurisdictional Context

Why local counsel matters in Wyoming

Practicing law in Wyoming. Legal matters in Wyoming are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Casper are typically filed in the local municipal court or the appropriate Wyoming state district court, depending on subject matter and amount in controversy. An attorney licensed in Wyoming 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 Wyoming courts without local counsel or pro hac vice admission.

Looking for additional Wyoming attorneys? Browse all attorneys in Casper or all attorneys in Wyoming.

Frequently Asked

Common questions about Michael J. Sullivan

Where is Michael J. Sullivan's law office located?
Michael J. Sullivan's law practice is located in Casper, Wyoming. The firm is Lewis Roca Rothgerber Christie LLP. You can contact the office directly through this profile page.
What practice areas does Michael J. Sullivan handle?
Michael J. Sullivan focuses on business, litigation, environmental, adr. Each practice area listed reflects experience handling cases of that type in Wyoming.
How long has Michael J. Sullivan practiced law?
Michael J. Sullivan has 62+ years of legal experience and has been licensed since 1964.
Where did Michael J. Sullivan go to law school?
Michael J. Sullivan earned their education at (J.D., 1964); (B.S. Petroleum, 1961).
How can I contact Michael J. Sullivan for a consultation?
You can contact Michael J. Sullivan 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 Michael J. Sullivan received?
Michael J. Sullivan's notable recognition includes: AV Preeminent.

Education

J.D.
University of Wyoming College of Law
- 1964
B.S. Petroleum
University of Wyoming
- 1961

Awards

AV Preeminent

Bar Admissions

Wyoming
Admitted: 1964
U.S. District Court, District of Wyoming
Admitted: 1964
U.S. Supreme Court U.S. Court of Appeals, Tenth Circuit
Admitted: 1980

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