A former managing partner of New York’s defunct Donovan Leisure Newton & Irvine who retired two years before the firm folded in 1998 has sued 30 former Donovan Leisure partners for $1.2 million in unpaid retirement benefits.

Corporate partner Gordon C. Osmond, who retired in 1995 after 35 years at Donovan Leisure, sued his former partners in Manhattan State Supreme Court on May 5 for failure to uphold a 1995 retirement agreement. Mr. Osmond, 64, sat on Donovan Leisure’s executive committee for six years after serving as its managing partner under executive committee chairman Sanford Litvack from 1984 to 1989.