He is a member of The New Jersey, Florida and District of Columbia bars. He is a member Of the Villanova School of Law Sports and Entertainment Law Advisory Board.
Nick has been a Deputy Attorney General in New Jersey and served as Counsel to the New Jersey State Athletic Control Board since 1995. In his role as Counsel, he is responsible for reviewing television, Promotional and managerial contracts, licensing issues, medical issues and bout agreements.
With regard to mixed martial arts, Nicholas authored the draft rules for the sport in 1999 and the unified rules in 2001 as New Jersey was the first state to legalize this sport. These rules are now followed by over thirty states and several countries. In 2006, Nicholas authored the rules for the creation of an amateur circuit of mixed martial arts.
These rules are now followed by several other states. He is currently serving on an Association of Boxing Commissions committee to standardize amateur mixed martial arts rules throughout the U.S. and Canada. He is a also member of the Association of Boxing Commissions legal committee. He was New Jersey's representative on the National Association of Attorneys General Boxing Task Force from 1998 to 2000. He drafted the Uniform Rules for Championship Boxing Contests in 1998 which have become known as the ABC Championship Rules and are universally used today. In 2008, he was selected by the Superior Court of Passaic County as the expert mediator in a dispute involving world champion boxer Kendall Holt. He has represented the State in matters involving such parties as Mike Tyson, Main Events, Top Rank, Don King, Oscar De La Hoya, George Foreman and Lennox Lewis.