Complex sentence: Pištěk, the current vice-rector of the institute and a former student of Roubík's, is a freelance architect (all four of the core people working to open the school still have their day jobs) and is still young enough to remember his school days.
Split into simpler sentences: Pištěk, the current vice-rector of the institute and a former student of Roubík's, is a freelance architect. All four of the core people working to open the school still have their day jobs and are still young enough to remember their school days.