Diamond, 65, of New Hyde Park, is running on the Democratic and Republican party lines. He has been a Nassau County Supreme Court justice since 2004. He is a supervising judge of guardianship matters since 2016. Previously, he was the senior vice president and general counsel for Curran & Connors, a graphics firm in Hauppauge from 2000-2003. He filled two vacancies as a Nassau County Court judge through two gubernatorial appointments by George Pataki from 1999-2000. He worked for the Garden City law firm of Fishkin & Pugach, concentrating in the areas of criminal and personal injury law from 1992-1999 and previously worked in business from 1986-1992. He was also a village prosecutor in Manorhaven from 1994-1996. He was a Nassau County assistant district attorney from 1976-1986. He received his law degree from Hofstra University School of Law and a bachelor’s degree from Rutgers University. He was admitted to the New York State Bar in 1979. He is a member of the Nassau County Bar Association.