Marsh & McLennan Agency LLC (Formerly Assurance Agency) - Industry Partners Looking for an industry partner to provide service to your staffing firm? Search Our Industry Partners: Go back to directory. Add to Address Book. Marsh & McLennan Agency LLC (Formerly Assurance Agency) Marsh & McLennan Agency LLC (Formerly Assurance Agency) Contact: Scott Ravanesi 20 N Martingale Road Suite 100 Schaumburg IL 60173 work Work Phone: (847) 463-7166work Work Email: Scott.ravanesi@marshmma.comINTERNET Website: https://www.marshmma.com/ Categories: Industry Partners Updated 2 months ago.