Atty. William Joseph McMahon

Atty. William Joseph McMahon

William Joseph McMahon is a lawyer practicing litigation, trust law, estate planning and 1 other area of law. William received a B.A. degree from University of California at Berkeley in 1986, and has been licensed for 31 years.

Oakland Oakland 31 yrs experience 31 year
Call (833) 603-8630 Book Appointment

Profile Summary

About William Joseph McMahon at a glance

William Joseph McMahon is a Dep. Atty. Gen., Atty. Gen.'s Off. based in Oakland, California. They have 31+ years of legal experience, licensed to practice since 1995. Their practice focuses on trusts, estate planning, employment, and litigation. Admitted to practice in California (1995) and U.S. District Court, Northern District of California (1995). Educated at University of San Francisco (J.D., 1995) and University of California at Berkeley (B.A., 1986). Recognitions include Peer Reviewed. Serands clients in Oakland, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Joseph McMahon is a lawyer practicing litigation, trust law, estate planning and 1 other area of law
  • William received a B.A. degree from University of California at Berkeley in 1986, and has been licensed for 31 years
  • William practices in Oakland, CA

Practice Areas Explained

William Joseph McMahon's Areas of Practice

Each practice area below reflects the types of cases William Joseph McMahon handles, with a brief overview of what that area of law covers.

Trusts

William Joseph McMahon is one of 104,171 trusts attorneys indexed nationally. Browse trusts attorneys in California →

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

William Joseph McMahon is one of 226,536 estate planning attorneys indexed nationally. Browse estate planning attorneys in California →

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

William Joseph McMahon is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in California →

Civil Litigation

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

William Joseph McMahon 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 Oakland 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 Oakland or all attorneys in California.

Frequently Asked

Common questions about William Joseph McMahon

Where is William Joseph McMahon's law office located?
William Joseph McMahon's law practice is located in Oakland, California. You can contact the office directly through this profile page.
What practice areas does William Joseph McMahon handle?
William Joseph McMahon focuses on trusts, estate planning, employment, litigation. Each practice area listed reflects experience handling cases of that type in California.
How long has William Joseph McMahon practiced law?
William Joseph McMahon has 31+ years of legal experience and has been licensed since 1995.
Where did William Joseph McMahon go to law school?
William Joseph McMahon earned their education at (J.D., 1995); (B.A., 1986).
How can I contact William Joseph McMahon for a consultation?
You can contact William Joseph McMahon 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 William Joseph McMahon received?
William Joseph McMahon's notable recognition includes: Peer Reviewed.

Education

J.D.
University of San Francisco
- 1995
B.A.
University of California at Berkeley
- 1986

Awards

Peer Reviewed

Bar Admissions

California
Admitted: 1995
U.S. District Court, Northern District of California
Admitted: 1995

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