The TOIS series of concrete switches were made by Jens Zijlstra, who received a Master of Arts in Design with honors in 2019 from HAWK Hildesheim and a Bachelor of Fine Arts in Productdesign in 2013 from Bauhaus University Weimar.

He has a passion for problem solving, is a material-enthusiast and understands to communicate fluently in local and interantional teams and within hierarchies.

His toolbox is filled with Designer-hard skills from sketch to CAD to soft skills like the methods widely known with Design Thinking.