Atty. Jeffrey Thomas Hammill

Atty. Jeffrey Thomas Hammill

Jeffrey Thomas Hammill is a lawyer practicing workers compensation, employment & labor, construction & development. Jeffrey received a A.B. degree from Occidental College in 1989, and has been licensed for 34 years.

Ontario Ontario 34 yrs experience 34 year
Call (279) 221-5138 Book Appointment

Profile Summary

About Jeffrey Thomas Hammill at a glance

Jeffrey Thomas Hammill is an Associate based in Ontario, California, practicing at Dietz, Gilmor & Chazen. They have 34+ years of legal experience, licensed to practice since 1992. Their practice focuses on employment and workers comp. Admitted to practice in California (1992). Educated at Whittier College School of Law (J.D., 1992) and Occidental College (A.B., 1989). Serands clients in Ontario, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Jeffrey Thomas Hammill is a lawyer practicing workers compensation, employment & labor, construction & development
  • Jeffrey received a A.B. degree from Occidental College in 1989, and has been licensed for 34 years
  • Jeffrey practices at Dietz, Gilmor & Chazen in Ontario, CA

Practice Areas Explained

Jeffrey Thomas Hammill's Areas of Practice

Each practice area below reflects the types of cases Jeffrey Thomas Hammill handles, with a brief overview of what that area of law covers.

Employment Law

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

Jeffrey Thomas Hammill is one of 169,120 employment attorneys indexed nationally. Browse employment attorneys in California →

Workers Compensation

Workers compensation lawyers help injured workers get medical care, lost wages, and disability benefits. Free consult, no fee unless you win.

Jeffrey Thomas Hammill is one of 55,389 workers comp attorneys indexed nationally. Browse workers comp 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 Ontario 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 Ontario or all attorneys in California.

Frequently Asked

Common questions about Jeffrey Thomas Hammill

Where is Jeffrey Thomas Hammill's law office located?
Jeffrey Thomas Hammill's law practice is located in Ontario, California. The firm is Dietz, Gilmor & Chazen. You can contact the office directly through this profile page.
What practice areas does Jeffrey Thomas Hammill handle?
Jeffrey Thomas Hammill focuses on employment, workers comp. Each practice area listed reflects experience handling cases of that type in California.
How long has Jeffrey Thomas Hammill practiced law?
Jeffrey Thomas Hammill has 34+ years of legal experience and has been licensed since 1992.
Where did Jeffrey Thomas Hammill go to law school?
Jeffrey Thomas Hammill earned their education at (J.D., 1992); (A.B., 1989).
How can I contact Jeffrey Thomas Hammill for a consultation?
You can contact Jeffrey Thomas Hammill 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.

Education

J.D.
Whittier College School of Law
- 1992
A.B.
Occidental College
- 1989

Bar Admissions

California
Admitted: 1992

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