W alter P.J. Droege is a self-made German billionaire who is the founder and chairman of the Droege Group, a privately held international consulting and investment firm. He founded the company in the 1980s with a focus on providing management consulting and restructuring services to other companies. He has since transformed the firm into a hybrid consulting and investment company that takes direct stakes in the companies it advises.

The Droege Group's strategy is to acquire and develop mid-sized companies in a variety of industries. The firm has a diversified portfolio of businesses in sectors such as healthcare, technology, and industrial services. His wealth is derived from his ownership of the successful and privately held investment and consulting empire he created. He is a major figure in the German business and consulting community.