Support for Customer Care services and customer activation Provide with deep technical knowledge of the network platform in daily operations. The Tier3 Network Engineer analyses complex problems on existing services and maintains the consistency of deployed configurations, releases and protocols. The Tier3 Network Engineer is part of the On-Call Duty Plans for Customer Care support. The Tier3 Network Engineer supports platform or node migrations during scheduled maintenances. The Tier3 Network Engineer activates new services on the configuration level of active network elements and on the monitoring and billing systems as part of the CSD processes.