Atty. Greg W Hennessy

Atty. Greg W Hennessy

Greg W Hennessy is a lawyer practicing natural resources, personal injury, commercial litigation and 5 other areas of law. Greg received a B.A. degree from University of North Dakota in 1974, and has been licensed for 49 years.

Williston Williston 49 yrs experience 49 year
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Profile Summary

About Greg W Hennessy at a glance

Greg W Hennessy is a Member based in Williston, North Dakota, practicing at Hennessy Law Office, P.C.. They have 49+ years of legal experience, licensed to practice since 1977. Their practice focuses on child custody, personal injury, business, litigation, and environmental. Admitted to practice in North Dakota (1977) and Montana (1979). Educated at University of North Dakota (J.D., 1977) and University of North Dakota (B.A., 1974). Recognitions include BV Distinguished. Active member of State Bar Association of North Dakota (Investigator, Inquiry Committee West, 1994-2001) State Bar of Montana Upper Missouri and American Bar Associations American Trial Lawyers Association Montana and North Dakota Trial Lawyers Associations. Serands clients in Williston, ND and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Greg W Hennessy is a lawyer practicing natural resources, personal injury, commercial litigation and 5 other areas of law
  • Greg received a B.A. degree from University of North Dakota in 1974, and has been licensed for 49 years
  • Greg practices at Hennessy Law Office, P.C. in Williston, ND

Practice Areas Explained

Greg W Hennessy's Areas of Practice

Each practice area below reflects the types of cases Greg W Hennessy handles, with a brief overview of what that area of law covers.

Child Custody & Visitation

Greg W Hennessy is one of 31,241 child custody attorneys indexed nationally. Browse child custody attorneys in North Dakota →

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

Greg W Hennessy is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in North Dakota →

Business & Corporate Law

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

Greg W Hennessy is one of 501,317 business attorneys indexed nationally. Browse business attorneys in North Dakota →

Civil Litigation

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

Greg W Hennessy is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in North Dakota →

Environmental Law

Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

Greg W Hennessy is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in North Dakota →

Jurisdictional Context

Why local counsel matters in North Dakota

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

Looking for additional North Dakota attorneys? Browse all attorneys in Williston or all attorneys in North Dakota.

Frequently Asked

Common questions about Greg W Hennessy

Where is Greg W Hennessy's law office located?
Greg W Hennessy's law practice is located in Williston, North Dakota. The firm is Hennessy Law Office, P.C.. You can contact the office directly through this profile page.
What practice areas does Greg W Hennessy handle?
Greg W Hennessy focuses on child custody, personal injury, business, litigation, environmental. Each practice area listed reflects experience handling cases of that type in North Dakota.
How long has Greg W Hennessy practiced law?
Greg W Hennessy has 49+ years of legal experience and has been licensed since 1977.
Where did Greg W Hennessy go to law school?
Greg W Hennessy earned their education at (J.D., 1977); (B.A., 1974).
How can I contact Greg W Hennessy for a consultation?
You can contact Greg W Hennessy 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 Greg W Hennessy received?
Greg W Hennessy's notable recognition includes: BV Distinguished.

Education

J.D.
University of North Dakota
- 1977
B.A.
University of North Dakota
- 1974

Awards

BV Distinguished

Bar Admissions

North Dakota
Admitted: 1977
Montana
Admitted: 1979

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