Atty. Mark Nicholas Semenoff

Atty. Mark Nicholas Semenoff

Mark Nicholas Semenoff is a lawyer practicing environmental law, natural resources law, international law and 4 other areas of law. Mark received a B.A. degree from University of California in 1980, and has been licensed for 40 years.

Denver Denver 40 yrs experience 40 year
Call (720) 362-1899 Book Appointment

Profile Summary

About Mark Nicholas Semenoff at a glance

Mark Nicholas Semenoff is a Member based in Denver, Colorado. They have 40+ years of legal experience, licensed to practice since 1986. Their practice focuses on formation, contracts, business, litigation, and environmental. Admitted to practice in Colorado U.S. District Court, District of Colorado (1986). Educated at Boalt Hall School of Law, University of California, Berkeley (J.D., 1996) and University of California (B.A. University, 1980). Recognitions include AV Preeminent. Active member of Denver Bar Association. Serands clients in Denver, CO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Nicholas Semenoff is a lawyer practicing environmental law, natural resources law, international law and 4 other areas of law
  • Mark received a B.A. degree from University of California in 1980, and has been licensed for 40 years
  • Mark practices in Denver, CO

Practice Areas Explained

Mark Nicholas Semenoff's Areas of Practice

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

Business Formation

Mark Nicholas Semenoff is one of 35,584 formation attorneys indexed nationally. Browse formation attorneys in Colorado →

Contracts

Mark Nicholas Semenoff is one of 76,762 contracts attorneys indexed nationally. Browse contracts attorneys in Colorado →

Business & Corporate Law

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

Mark Nicholas Semenoff is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Colorado →

Civil Litigation

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

Mark Nicholas Semenoff is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Colorado →

Environmental Law

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

Mark Nicholas Semenoff is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in Colorado →

Jurisdictional Context

Why local counsel matters in Colorado

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

Looking for additional Colorado attorneys? Browse all attorneys in Denver or all attorneys in Colorado.

Frequently Asked

Common questions about Mark Nicholas Semenoff

Where is Mark Nicholas Semenoff's law office located?
Mark Nicholas Semenoff's law practice is located in Denver, Colorado. You can contact the office directly through this profile page.
What practice areas does Mark Nicholas Semenoff handle?
Mark Nicholas Semenoff focuses on formation, contracts, business, litigation, environmental. Each practice area listed reflects experience handling cases of that type in Colorado.
How long has Mark Nicholas Semenoff practiced law?
Mark Nicholas Semenoff has 40+ years of legal experience and has been licensed since 1986.
Where did Mark Nicholas Semenoff go to law school?
Mark Nicholas Semenoff earned their education at (J.D., 1996); (B.A. University, 1980).
How can I contact Mark Nicholas Semenoff for a consultation?
You can contact Mark Nicholas Semenoff 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 Mark Nicholas Semenoff received?
Mark Nicholas Semenoff's notable recognition includes: AV Preeminent.

Education

J.D.
Boalt Hall School of Law, University of California, Berkeley
- 1996
B.A. University
University of California
- 1980

Awards

AV Preeminent

Bar Admissions

Colorado U.S. District Court, District of Colorado
Admitted: 1986

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