CDG, NCE, MAD, BCN, FCO are a few of the stations in Europe that still have 'real' Delta employees; at CDG, check in, and gate duties are handled by AF staff using AF systems, but the ticket desk has DL employees, and the Red Coats are real Delta employees.
At other stations, including AMS, most of the 'Delta' agents are contract staff, even those dressed in Delta uniforms. In ZRH for example, only the station manager and the assistant station manager are Delta employees, all others are Swissport staff, including those in the 'Red Coat' uniform. FRA is also pretty much all contract staff, etc.