November 28, 2015 by mirjam Will you join us today at the Pre-party Climate @Leiden?Our founder Rutger de Graaf will be the keynote speaker at the Pre-party Climate 2015, this afternoon in Leiden.Don’t have any plans yet?Check out the program and register here.See you there! in Featured 0 comments ShareYou may also likeBlue21 cofounder, Rutger de Graaf, speaking at JMSE Webinar 2023We have a new vacancyTwo young engineers joining Blue21 team