Atty. Donald John Sullivan

Atty. Donald John Sullivan

Donald John Sullivan is a lawyer practicing litigation, intellectual property law. Donald received a B.A. degree from University of New Mexico in 1987, and has been licensed for 36 years.

San Diego San Diego 36 yrs experience 36 year
Call (619) 923-4805 Book Appointment

Profile Summary

About Donald John Sullivan at a glance

Donald John Sullivan is a Member based in San Diego, California, practicing at Sullivan & Seymour, P.C.. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on real estate, ip, and litigation. Admitted to practice in California (1990), U.S. District Court, Southern District of California (1990), and U.S. District Court, Central District of California (1990). Educated at University of Michigan (J.D., 1990) and University of New Mexico (B.A., 1987). Recognitions include AV Preeminent. Active member of San Diego County Bar Association The State Bar of California American Inns of Court, Louis M and Welsh Chapter, Thomas More Society. Serands clients in San Diego, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Donald John Sullivan is a lawyer practicing litigation, intellectual property law
  • Donald received a B.A. degree from University of New Mexico in 1987, and has been licensed for 36 years
  • Donald practices at Sullivan & Seymour, P.C. in San Diego, CA

Practice Areas Explained

Donald John Sullivan's Areas of Practice

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

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Donald John Sullivan is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in California →

Intellectual Property

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

Donald John Sullivan is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in California →

Civil Litigation

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

Donald John Sullivan is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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 Diego 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 Diego or all attorneys in California.

Frequently Asked

Common questions about Donald John Sullivan

Where is Donald John Sullivan's law office located?
Donald John Sullivan's law practice is located in San Diego, California. The firm is Sullivan & Seymour, P.C.. You can contact the office directly through this profile page.
What practice areas does Donald John Sullivan handle?
Donald John Sullivan focuses on real estate, ip, litigation. Each practice area listed reflects experience handling cases of that type in California.
How long has Donald John Sullivan practiced law?
Donald John Sullivan has 36+ years of legal experience and has been licensed since 1990.
Where did Donald John Sullivan go to law school?
Donald John Sullivan earned their education at (J.D., 1990); (B.A., 1987).
How can I contact Donald John Sullivan for a consultation?
You can contact Donald John 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 Donald John Sullivan received?
Donald John Sullivan's notable recognition includes: AV Preeminent.

Education

J.D.
University of Michigan
- 1990
B.A.
University of New Mexico
- 1987

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1990
U.S. District Court, Southern District of California
Admitted: 1990
U.S. District Court, Central District of California
Admitted: 1990

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