Atty. Marc Denis Haefner

Atty. Marc Denis Haefner

Marc D. Haefner, a partner in the firm, represents clients in a wide range of complex commercial and intellectual property litigation.

Newark Newark 32 yrs experience 32 year
Call (973) 792-8432 Book Appointment

Profile Summary

About Marc Denis Haefner at a glance

Marc Denis Haefner is a Partner based in Newark, New Jersey, practicing at Walsh Pizzi O'Reilly Falanga LLP. They have 32+ years of legal experience, licensed to practice since 1994. Their practice focuses on trademark, copyright, business, federal crimes, and litigation. Admitted to practice in New Jersey (1994), U.S. District Court, District of New Jersey (1994), and U.S. Court of Appeals, Third Circuit (1998). Educated at University of Notre Dame (J.D., 1994) and University of Dallas (B.A., 1991). Recognitions include Peer Reviewed. Active member of Association of the Federal Bar of New Jersey New Jersey State Bar Association Essex County Bar Association. Serands clients in Newark, NJ and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Marc D. Haefner, a partner in the firm, represents clients in a wide range of complex commercial and intellectual property litigation
  • As a commercial litigator, he specializes in civil cases arising under the Racketeer Influenced and Corrupt Organizations Act (RICO), and has both successfully prosecuted and defended such cases
  • He has also defended numerous class actions brought under New Jersey’s Consumer Fraud Act
  • His intellectual property work consists mainly of trademark, copyright infringement, and trade secret litigation in federal court
  • In his 20 years of legal experience, Marc has also taken numerous appellate cases to successful conclusions
  • His appellate work has run the gamut from First Amendment cases involving religious liberty to issues of first impression on New Jersey’s Construction Lien Law
  • He has taken cases to appellate courts both when the firm represented the client below and when the case has been taken initially as an appellate matter
  • Marc earned his J.D., magna cum laude, from Notre Dame Law School, where he worked as the research assistant to Professor G. Robert Blakey, the recognized drafter of the RICO statute, and served as Conflicts Editor for the Journal of Legislation
  • After graduation, Marc clerked for the Honorable Harold A. Ackerman in the United States District Court for the District of New Jersey
  • In his previous position at a major New Jersey law firm, he chaired the firm’s Pro-Bono Committee and supervised cases involving prisoners’ rights, protection of landmark buildings, and the appropriate scheduling of marijuana in New Jersey
  • Sheehan Fellow 1991-1994
  • Conflicts Editor, Journal of Legislation, 1994

Author

  • "One Pitfall in Purchasing a Common-Law Trademark," New Jersey Law Journal, June 9, 2008, 192 N.J.L.J. 835
  • "RICO Still an Option for Defrauded Creditors," New Jersey Law Journal, July 23, 2007, 189 N.J.L.J. 336

Co-Author

  • "Offers of Judgment in Copyright Cases," The Metropolitan Corporate Counsel, June 2004, Volume 12, No. 6
  • "Did Reves Give Professional a Safe-Harbor Under Rico," Civil Rico Report, Volume 9, August 11, 1993

Practice Areas Explained

Marc Denis Haefner's Areas of Practice

Each practice area below reflects the types of cases Marc Denis Haefner handles, with a brief overview of what that area of law covers.

Trademark Law

Marc Denis Haefner is one of 23,222 trademark attorneys indexed nationally. Browse trademark attorneys in New Jersey →

Copyright Law

Marc Denis Haefner is one of 17,495 copyright attorneys indexed nationally. Browse copyright attorneys in New Jersey →

Business & Corporate Law

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

Marc Denis Haefner is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New Jersey →

Federal Crimes

Marc Denis Haefner is one of 6,773 federal crimes attorneys indexed nationally. Browse federal crimes attorneys in New Jersey →

Civil Litigation

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

Marc Denis Haefner is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New Jersey →

Jurisdictional Context

Why local counsel matters in New Jersey

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

Looking for additional New Jersey attorneys? Browse all attorneys in Newark or all attorneys in New Jersey.

Frequently Asked

Common questions about Marc Denis Haefner

Where is Marc Denis Haefner's law office located?
Marc Denis Haefner's law practice is located in Newark, New Jersey. The firm is Walsh Pizzi O'Reilly Falanga LLP. You can contact the office directly through this profile page.
What practice areas does Marc Denis Haefner handle?
Marc Denis Haefner focuses on trademark, copyright, business, federal crimes, litigation. Each practice area listed reflects experience handling cases of that type in New Jersey.
How long has Marc Denis Haefner practiced law?
Marc Denis Haefner has 32+ years of legal experience and has been licensed since 1994.
Where did Marc Denis Haefner go to law school?
Marc Denis Haefner earned their education at (J.D., 1994); (B.A., 1991).
How can I contact Marc Denis Haefner for a consultation?
You can contact Marc Denis Haefner 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 Marc Denis Haefner received?
Marc Denis Haefner's notable recognition includes: Peer Reviewed.

Education

J.D.
University of Notre Dame
- 1994
B.A.
University of Dallas
- 1991

Awards

Peer Reviewed

Bar Admissions

New Jersey
Admitted: 1994
U.S. District Court, District of New Jersey
Admitted: 1994
U.S. Court of Appeals, Third Circuit
Admitted: 1998

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