From April 1989 to September 2000, he was a capital partner at defendant Riker, Danzig, Scherer, Hyland, & Perretti, LLP. At fifty-three years of age, plaintiff withdrew from defendant and joined another law firm with offices in this State. At the time of his departure, plaintiff was a party to an agreement with defendant that is the center of this dispute. The agreement sets forth a withdrawing or retiring partner's entitlement to certain monies as well as a notice provision governing the departure itself.