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 $475,000,000.00 in verdicts and settlements.

Kenneth J. LaDuca

David Blum


David Blum is a civil litigator who joined GLG after a successful stint with Zukerberg & Halperin, PLLC, where he represented clients in all types of personal injury matters throughout Maryland, Virginia, and the District of Columbia. A skilled negotiator and experienced trial advocate, Mr. Blum maintains a client-centric approach throughout all stages of the case to obtain the best possible results. Mr. Blum is currently barred in the District of Columbia and Maryland, and pending admission in Virginia.

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.

Kenneth J. LaDuca

Daniel Cappelletti


Daniel Cappelletti is an Associate at Grenier Law Group PLLC. Mr. Cappelletti joined after a nearly two year clerkship with the Honorable José M. López in the Superior Court of the District of Columbia.

Mr. Cappelletti is a Bethesda, MD native and graduated from the American University Washington College of Law. During law school, he served as a Note & Comment Editor on the American University International Law Review, Student Attorney in the International Human Rights Law Clinic, Law Clerk at the Maryland Office of the Public Defender, and Dean’s Fellow for Dean Emeritus Claudio Grossman. Prior to attending law school, Mr. Cappelletti earned his B.A. in Law and Society from the American University in 2012.

Nancy Grenier

Office Manager

Alyssa Barton 


Alyssa Barton is a paralegal at Grenier Law Group. Ms. Barton, a Fredericksburg, Virginia native, graduated from James Madison University with a B.S. in Justice Studies with a Concentration in Global Justice.

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.

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.