John Umans, based in Amsterdam, NH, NL, is currently a Manager techniek at Unica Building Services, bringing experience from previous roles at BAM Bouw en Techniek, Eneco, Strukton Worksphere and Stork Installatietechniek Utrecht.. John Umans holds a 2009 - 2010 Instituut Praktische Vaardigheden. With a robust skill set that includes Account Management, Projectleiding, Project Management, People manager, Team leider/speler and more, John Umans contributes valuable insights to the industry. John Umans has 1 email on RocketReach.