Atty. Mark Dean Sophir

Atty. Mark Dean Sophir

Mark Dean Sophir is a lawyer practicing ethics & professional responsibility, business litigation, future energy and 7 other areas of law. Mark received a B.B.A. degree from University of Texas at Austin in 1981, and has been licensed for 41 years.

St. Louis St. Louis 41 yrs experience 41 year
Call (314) 282-4855 Book Appointment

Profile Summary

About Mark Dean Sophir at a glance

Mark Dean Sophir is a Partner based in St. Louis, Missouri, practicing at Armstrong Teasdale LLP. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on trusts, business, ip, litigation, and energy. Admitted to practice in Missouri (1985) and Illinois U.S. District Court, Eastern District of Missouri U.S. Court of Appeals, Eighth Circuit U.S (1986). Educated at University of Texas School of Law (J.D., 1985) and University of Texas at Austin (B.B.A. Accounting, 1981). Recognitions include AV Preeminent. Serands clients in St. Louis, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Dean Sophir is a lawyer practicing ethics & professional responsibility, business litigation, future energy and 7 other areas of law
  • Mark received a B.B.A. degree from University of Texas at Austin in 1981, and has been licensed for 41 years
  • Mark practices at Armstrong Teasdale LLP in St. Louis, MO

Practice Areas Explained

Mark Dean Sophir's Areas of Practice

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

Trusts

Mark Dean Sophir is one of 104,171 trusts attorneys indexed nationally. Browse trusts attorneys in Missouri →

Business & Corporate Law

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

Mark Dean Sophir is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Mark Dean Sophir is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Missouri →

Civil Litigation

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

Mark Dean Sophir is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Missouri →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

Mark Dean Sophir is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

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

Looking for additional Missouri attorneys? Browse all attorneys in St. Louis or all attorneys in Missouri.

Frequently Asked

Common questions about Mark Dean Sophir

Where is Mark Dean Sophir's law office located?
Mark Dean Sophir's law practice is located in St. Louis, Missouri. The firm is Armstrong Teasdale LLP. You can contact the office directly through this profile page.
What practice areas does Mark Dean Sophir handle?
Mark Dean Sophir focuses on trusts, business, ip, litigation, energy. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Mark Dean Sophir practiced law?
Mark Dean Sophir has 41+ years of legal experience and has been licensed since 1985.
Where did Mark Dean Sophir go to law school?
Mark Dean Sophir earned their education at (J.D., 1985); (B.B.A. Accounting, 1981).
How can I contact Mark Dean Sophir for a consultation?
You can contact Mark Dean Sophir 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 Dean Sophir received?
Mark Dean Sophir's notable recognition includes: AV Preeminent.

Education

J.D.
University of Texas School of Law
- 1985
B.B.A. Accounting
University of Texas at Austin
- 1981

Awards

AV Preeminent

Bar Admissions

Missouri
Admitted: 1985
Illinois U.S. District Court, Eastern District of Missouri U.S. Court of Appeals, Eighth Circuit U.S
Admitted: 1986

Reviews

5.0
1 Review
5 0
4 0
3 0
2 0
1 0
These reviews belong to platform users; they do not constitute advertisement or promotion for the attorney. Opinions are published for informational purposes only.

No reviews yet.