Complex sentence: He joined BVV Den Bosch eight years later, being reconverted from a striker to a midfielder; since the age of 15, he also worked as a carpenter, and made formwork for a concrete factory.
Split into simpler sentences: He joined BVV Den Bosch eight years later, being reconverted from a striker to a midfielder. Since the age of 15, he also worked as a carpenter, and made formwork for a concrete factory.