Macromill Inc. announced that Jan Willem Gerritsen, Executive Officer, Europe/US/Latin America Operations of the Macromill Group and Co-founder and Chief Executive Officer of MetrixLab, is leaving the company on 8th January to pursue another opportunity. Scott Ernst, Representative Executive Officer and Global CEO of the Macromill Group will take over his roles and responsibilities on an interim basis. Jan Willem Gerritsen co-founded MetrixLab in 1999, and went on to build the business, managing it skillfully through its incredibly rapid global expansion. He played a key role in the integration of MetrixLab and Macromill following their merger in 2014.