Yes, there is a 24hrs shuttle service:
- Upon arrival at the JFK airport, take the AirTrain to Federal Circle Station.
- Call the hotel by using the hotel shuttle kiosk at the station or call directly at +1 (718) 322-2300 for pickup.
- Shuttles to the airport depart every 30 minutes.
- For departures, drop-off is curbside for quick check-in and baggage check
You will find further information about that on the website of the radisson JFK.