Atty. David John Armstrong

Atty. David John Armstrong

Mr. David John Armstrong is a lawyer practicing energy & project finance, environmental & natural resource law, litigation.

Phoenix Phoenix 34 yrs experience 34 year
Call (623) 267-0743 Book Appointment

Profile Summary

About David John Armstrong at a glance

David John Armstrong is a Partner based in Phoenix, Arizona, practicing at Ballard Spahr LLP. They have 34+ years of legal experience, licensed to practice since 1992. Their practice focuses on litigation, environmental, and energy. Admitted to practice in New Jersey (1992), Pennsylvania (1992), Arizona (1996), and U.S. Court of Appeals, Ninth Circuit U.S. District Court, Eastern District of Pennsylvania and U.S. (1997). Educated at Temple University James E. Beasley School of Law (J.D., 1992) and College of Charleston (B.A., 1985). Recognitions include AV Preeminent. Serands clients in Phoenix, AZ and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. David John Armstrong is a lawyer practicing energy & project finance, environmental & natural resource law, litigation
  • David received a B.A. degree from College of Charleston in 1985, and has been licensed for 34 years
  • David practices at Ballard Spahr LLP in Phoenix, AZ

Practice Areas Explained

David John Armstrong's Areas of Practice

Each practice area below reflects the types of cases David John Armstrong 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.

David John Armstrong is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Arizona →

Environmental Law

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

David John Armstrong is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in Arizona →

Energy & Utilities Law

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

David John Armstrong is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in Arizona →

Jurisdictional Context

Why local counsel matters in Arizona

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

Looking for additional Arizona attorneys? Browse all attorneys in Phoenix or all attorneys in Arizona.

Frequently Asked

Common questions about David John Armstrong

Where is David John Armstrong's law office located?
David John Armstrong's law practice is located in Phoenix, Arizona. The firm is Ballard Spahr LLP. You can contact the office directly through this profile page.
What practice areas does David John Armstrong handle?
David John Armstrong focuses on litigation, environmental, energy. Each practice area listed reflects experience handling cases of that type in Arizona.
How long has David John Armstrong practiced law?
David John Armstrong has 34+ years of legal experience and has been licensed since 1992.
Where did David John Armstrong go to law school?
David John Armstrong earned their education at (J.D., 1992); (B.A., 1985).
How can I contact David John Armstrong for a consultation?
You can contact David John Armstrong 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 David John Armstrong received?
David John Armstrong's notable recognition includes: AV Preeminent.

Education

J.D.
Temple University James E. Beasley School of Law
- 1992
B.A.
College of Charleston
- 1985

Awards

AV Preeminent

Bar Admissions

New Jersey
Admitted: 1992
Pennsylvania
Admitted: 1992
Arizona
Admitted: 1996
U.S. Court of Appeals, Ninth Circuit U.S. District Court, Eastern District of Pennsylvania and U.S.
Admitted: 1997
Maryland
Admitted: 2008

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.