Atty. William J. Mostyn, Jr.

Atty. William J. Mostyn, Jr.

William J. Mostyn, Jr. is a lawyer.

Waltham Waltham 71 yrs experience 71 year
Call (508) 827-6680 Book Appointment

Profile Summary

About William J. Mostyn, Jr. at a glance

William J. Mostyn, Jr. is an attorney based in Waltham, Massachusetts. They have 71+ years of legal experience, licensed to practice since 1955. Admitted to practice in Massachusetts (1955). Educated at Northeastern University LL.B. (—) and Northeastern University A.B. (—). Serands clients in Waltham, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William J. Mostyn, Jr. is a lawyer
  • William received a A.B. degree from Northeastern University, and has been licensed for 71 years
  • William practices in Waltham, MA

Jurisdictional Context

Why local counsel matters in Massachusetts

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

Looking for additional Massachusetts attorneys? Browse all attorneys in Waltham or all attorneys in Massachusetts.

Frequently Asked

Common questions about William J. Mostyn, Jr.

Where is William J. Mostyn, Jr.'s law office located?
William J. Mostyn, Jr.'s law practice is located in Waltham, Massachusetts. You can contact the office directly through this profile page.
How long has William J. Mostyn, Jr. practiced law?
William J. Mostyn, Jr. has 71+ years of legal experience and has been licensed since 1955.
Where did William J. Mostyn, Jr. go to law school?
William J. Mostyn, Jr. earned their education at (—); (—).
How can I contact William J. Mostyn, Jr. for a consultation?
You can contact William J. Mostyn, Jr. 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

Northeastern University LL.B.
- In Progress
Northeastern University A.B.
- In Progress

Bar Admissions

Massachusetts
Admitted: 1955

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