Nicholas M. Centrella, Esq. Conrad O'Brien PC, Philadelphia Mr. Centrella is the Managing Shareholder at Conrad O’Brien Gellman & Rhon, PC in Philadelphia. He received a B.S. from Georgetown University and his law degree from the University of Pennsylvania School of Law in 1992. Mr. Centrella regularly represents law firms in legal malpractice and other civil actions, and has defended major corporations in complex commercial, regulatory civil RICO, and products liability disputes. Mr. Centrella’s white collar criminal defense practice includes the defense of corporations and individual federal grand jury investigations and criminal proceedings.