OVERVIEW. E.R. Quinn Company (E.R. Quinn) is a Long Island-based insurance claims adjusting/investigating firm which has been working on behalf of insurance companies, TPAs, law firms and municipalities throughout the United States for over 35 years. We are seeking an. Experienced Property Field Adjuster. to handle primarily third-party and some first-party property damage claims in the New York Metropolitan area. Our adjusters handle field activ...