In addition, Ernst holds a position as an adjunct research scientist at Simula Research Laboratory, where he until Dec. 2016 headed the Cloud department. Currently, Ernst act as the Scientific Leader of Communication Technologies in the RCN funded infrastructure project eX3 (Experimental Infrastructure for Exploration of Exascale Computing), and he is the deliverable manager of the H2020 project Melodic (Multi-cloud Execution-ware for Large-scale Optimised Data-Intensive Computing). His teaching responsibilities include being the course coordinator of IMT2006 Computer Networks and IMT2007 Network Security.