Systems, methods, and software for controlling Quality of Service (QoS) selection in Mobile Edge Computing (MEC) services. In one embodiment, a MEC server is at a Radio Access Network (RAN), and implements edge applications that provide the MEC services. The MEC server queries a core network for a QoS policy for a mobile device that indicates QoS profile options for the mobile device, and receives the QoS policy from the core network. The MEC server monitors for a triggering event that triggers selection of a QoS profile, selects the QoS profile from the QoS profile options for a user plane connection established for a MEC service between the mobile device and an edge application in response to the triggering event, and provides a QoS profile identifier for the QoS profile to a base station in the RAN to enforce the QoS profile on the user plane connection.