The huge fleet contract covers more than 12,000 vehicles across 26 countries and was awarded to LeasePlan.
The companies have worked together for the past six years and LeasePlan won the deal extension with ISS after a competitive pitch process.
Mike Skuse, UK fleet manager at ISS UK, said: ‘We have worked with LeasePlan for a number of years but our fleet requirements have changed constantly, something that LeasePlan has been able to keep up with.
‘Aside from its reporting capabilities, its international presence, competitive tender response, innovative and client focused solutions all contributed to the continuation of the relationship.’
LeasePlan UK managing director Kevin McNally said: ‘We are delighted to be renewing our contract with ISS, which has been a customer for the past six years. Our focus for pan-European organisations is to ensure they receive the best levels of management information and expert advice.’
Winners included Manufacturer of the Year – New Vehicle Supply: Toyota; Manufacturer of the Year - After Sales: VW; Managing Partner of the Year: Autoglass; Supplier of the Year: FMG; Best Newcomer of the Year: Kwik-Fit; Auction Centre of the Year: BCA Brighouse; Auction Partner of the Year: Chelmsford Car Auction; Individual Recognition Award: David Scobie, of All Fleet Services.