Erik Roesink started his active “membrane life” in the seventies, while studying at the University of Twente in The Netherlands. In the mid-eighties he was one of the co-founders of X-Flow, now part of Pentair. Early 2013 he left Pentair X-Flow to become part-time professor Advanced Membranes at the University of Twente, where he developed novel hollow fiber nanofiltration membranes. Based upon this development he founded NX Filtration in 2016. NX Filtration focuses on the production of hollow fiber membranes for nanofiltration as well as a new generation ultra- and microfiltration membranes.