Teunis den Hartog has extensive experience in the construction and maintenance sector, serving as a Technisch projectleider and holding multiple supervisory roles in planmatig onderhoud at Portaal since January 1983. Prior to this, Teunis worked as a Timmerman at Bouwbedrijf Korteweg from 1981 to 1983. Teunis has achieved various qualifications in safety and management, including Veilig Dak Inspecteur in 2018, Asbestdeskundige SC-570 in 2017, and Fire Safety Manager in 2016, among others. Educational backgrounds include comprehensive training in construction technology, safety, and asbestos management, complemented by a foundational education in carpentry from LTS bouw.