Our Team

Grenier Law Group
Peter Grenier

Peter C. Grenier


Recognized as “Washington’s Hottest Personal Injury Lawyer” by Washingtonian Magazine. Peter Grenier is widely recognized as one of the country’s most successful civil trial attorneys, having amassed more than $500,000,000.00 in verdicts and settlements.

Kenneth J. LaDuca

John Antishin


John Antishin joined GLG after graduating from The George Washington University Law School. While in law school, Mr. Antishin interned with the United States General Services Administration and the United States Army Judge Advocate General’s Corps. Additionally, he was a member of the Moot Court, Mock Trial, and Alternative Dispute Resolution skills boards, as well as an Articles Editor for the Federal Circuit Bar Journal.

Nancy Grenier

Office Manager

Mara Osterburg


Mara Osterburg is a paralegal at Grenier Law Group. Ms. Osterburg is originally from Denver, Colorado and recently graduated from American University summa cum laude with a BA in Justice and Law (concentrating in Criminology) and a BA in Psychology.

Jimmy Peccie


Jimmy Peccie is a paralegal at Grenier Law Group. Jimmy, a native of Norfolk, Virginia, graduated from Washington & Lee University with a B.A., majoring in Politics and minoring in Law, Justice, and Society.

Genevieve Grenier

Paralegal (Part-time)

Genevieve Grenier is a part-time paralegal at Grenier Law Group.  She is a student at the Georgetown University McDonough School of Business.