Hlynur is a senior scientist at the Freshwater Division of the Marine and Freshwater Research Institute (MFRI) in Iceland. After finishing his PhD in biology at the University of Iceland, 2016 he started working at the MFRI and from 2017 he has been leading the annual monitoring surveys of the salmon stocks rivers in Northeast Iceland, including five of the six rivers in the Six Rivers Project. The annual survey of the rivers in Northeast Iceland has been carried out by the MFRI for more than 40 years.