Atty. Jeffrey M. Ernst

Atty. Jeffrey M. Ernst

Jeffrey M. Ernst is a lawyer practicing fraud, intellectual property, business law and 2 other areas of law.

Boston Boston 23 yrs experience 23 year
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Profile Summary

About Jeffrey M. Ernst at a glance

Jeffrey M. Ernst is an Associate based in Boston, Massachusetts, practicing at Donnelly, Conroy & Gelhaar, LLP. They have 23+ years of legal experience, licensed to practice since 2003. Their practice focuses on criminal defense, business, ip, white collar, and litigation. Admitted to practice in Massachusetts (2003). Educated at Harvard Law School (J.D., 2003) and Princeton University (B.A. Philosophy, 1997). Serands clients in Boston, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Jeffrey M. Ernst is a lawyer practicing fraud, intellectual property, business law and 2 other areas of law
  • Jeffrey received a B.A. degree from Princeton University in 1997, and has been licensed for 23 years
  • Jeffrey practices at Donnelly, Conroy & Gelhaar, LLP in Boston, MA

Practice Areas Explained

Jeffrey M. Ernst's Areas of Practice

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

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

Jeffrey M. Ernst is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Massachusetts →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Jeffrey M. Ernst is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Massachusetts →

Intellectual Property

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

Jeffrey M. Ernst is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Massachusetts →

White Collar Crimes

Jeffrey M. Ernst is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in Massachusetts →

Civil Litigation

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

Jeffrey M. Ernst is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Massachusetts →

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 Boston 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 Boston or all attorneys in Massachusetts.

Frequently Asked

Common questions about Jeffrey M. Ernst

Where is Jeffrey M. Ernst's law office located?
Jeffrey M. Ernst's law practice is located in Boston, Massachusetts. The firm is Donnelly, Conroy & Gelhaar, LLP. You can contact the office directly through this profile page.
What practice areas does Jeffrey M. Ernst handle?
Jeffrey M. Ernst focuses on criminal defense, business, ip, white collar, litigation. Each practice area listed reflects experience handling cases of that type in Massachusetts.
How long has Jeffrey M. Ernst practiced law?
Jeffrey M. Ernst has 23+ years of legal experience and has been licensed since 2003.
Where did Jeffrey M. Ernst go to law school?
Jeffrey M. Ernst earned their education at (J.D., 2003); (B.A. Philosophy, 1997).
How can I contact Jeffrey M. Ernst for a consultation?
You can contact Jeffrey M. Ernst 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.
Harvard Law School
- 2003
B.A. Philosophy
Princeton University
- 1997

Bar Admissions

Massachusetts
Admitted: 2003

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