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Atty. Mark Douglas Lonergan

Atty. Mark Douglas Lonergan

Mark Douglas Lonergan is a lawyer practicing lawsuits / disputes, equipment finance / leasing, debt collection and 7 other areas of law. Mark received a B.A. degree from University of Virginia in 1984, and has been licensed for 37 years.

San Francisco San Francisco 37 yrs experience 37 year
Call (415) 728-9546 Book Appointment

Profile Summary

About Mark Douglas Lonergan at a glance

Mark Douglas Lonergan is a Partner based in San Francisco, California, practicing at Severson And Werson. They have 37+ years of legal experience, licensed to practice since 1989. Their practice focuses on business, creditor rights, product liability, litigation, and insurance. Admitted to practice in California (1989). Educated at University of Virginia (J.D., 1989) and University of Virginia (B.A., 1984). Recognitions include AV Preeminent. Serands clients in San Francisco, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Douglas Lonergan is a lawyer practicing lawsuits / disputes, equipment finance / leasing, debt collection and 7 other areas of law
  • Mark received a B.A. degree from University of Virginia in 1984, and has been licensed for 37 years
  • Mark practices at Severson & Werson in San Francisco, CA

Practice Areas Explained

Mark Douglas Lonergan's Areas of Practice

Each practice area below reflects the types of cases Mark Douglas Lonergan 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.

Mark Douglas Lonergan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Creditor Rights & Collections

Mark Douglas Lonergan is one of 42,948 creditor rights attorneys indexed nationally. Browse creditor rights attorneys in California →

Product Liability

Mark Douglas Lonergan is one of 66,193 product liability attorneys indexed nationally. Browse product liability attorneys in California →

Civil Litigation

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

Mark Douglas Lonergan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Insurance Law

Insurance attorneys for coverage disputes, bad faith claims, denied claims, and policy disputes.

Mark Douglas Lonergan is one of 121,912 insurance attorneys indexed nationally. Browse insurance attorneys in California →

Jurisdictional Context

Why local counsel matters in California

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

Looking for additional California attorneys? Browse all attorneys in San Francisco or all attorneys in California.

Frequently Asked

Common questions about Mark Douglas Lonergan

Where is Mark Douglas Lonergan's law office located?
Mark Douglas Lonergan's law practice is located in San Francisco, California. The firm is Severson And Werson. You can contact the office directly through this profile page.
What practice areas does Mark Douglas Lonergan handle?
Mark Douglas Lonergan focuses on business, creditor rights, product liability, litigation, insurance. Each practice area listed reflects experience handling cases of that type in California.
How long has Mark Douglas Lonergan practiced law?
Mark Douglas Lonergan has 37+ years of legal experience and has been licensed since 1989.
Where did Mark Douglas Lonergan go to law school?
Mark Douglas Lonergan earned their education at (J.D., 1989); (B.A., 1984).
How can I contact Mark Douglas Lonergan for a consultation?
You can contact Mark Douglas Lonergan 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 Douglas Lonergan received?
Mark Douglas Lonergan's notable recognition includes: AV Preeminent.

Education

J.D.
University of Virginia
- 1989
B.A.
University of Virginia
- 1984

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1989

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