Sieger Zeilstra is an experienced project leader and plan coordinator currently employed at Siers Groep Oldenzaal B.V. since October 2019, with previous roles as a project leader, developer, and underground infrastructure executor. Prior experience includes serving as a shift leader instructor at City Skydive Centres B.V. from February 2017 to December 2021, and multiple positions at Poiesz Supermarkten B.V. from May 2008 to March 2017, including kopman and foreman of packaging. Short-term experience includes delivering medications and order picking at Apotheek Sasburg in mid-2012. Sieger Zeilstra holds a Bachelor of Engineering and a Bachelor of Safety and Security from NHL Hogeschool, as well as a propedeuse in Integrale Veiligheid and an Atheneum degree in Natuur & Techniek from Bogerman Sneek.