Jan van Overhagen, after completing his studies in Civil Engineering at TU Delft, had an architecture firm for 20 years. After transferring ownership, he continued as an initiator, leader, and owner in various real estate sectors, including investing, building, developing, and various forms of engineering. Additionally, he held numerous board and committee positions in related societal organizations, including sports. He has an above-average interest in the complementary world, (painting) art, and music, with a special place for the music of Bach.