In October 2009, the Studentenwerk Frankfurt am Main founded the affiliate company MainSWerk Service GmbH. The objective of the company is to carry out cleaning services, especially for institutions of the Studentenwerk Frankfurt am Main. The main shareholder is the Studentenwerk Frankfurt am Main, minority shareholder and service provider is Gies Dienstleistungen GmbH in Stadtallendorf. Due to hygiene regulations, the cleaning quality is especially important in public areas of the catering services of the Studentenwerk Frankfurt am Main. This is also a topic of high relevance for the residential halls. Until now, the cleaning of the areas was carried out by external companies. In order to ensure a consistently high quality of the cleaning services, the Studentenwerk Frankfurt am Main established a joint limited company with a cleaning service provider. The main shareholder is the Studentenwerk with 51% of the voting share. This ensures that the employees work for standard wages, and the cleaning staff employed by the new company has a closer relationship with the Studentenwerk Frankfurt am Main. The motivation of the employees to responsibly do their work is therefore to be increased. Savings potential is generated by the more efficient use of employees, the elimination of additional company margin for consumed services and the low-cost purchase of consumables. The foundation of the company was possible because of the Studentenwerk Act of 2006, § 3 Tasks, Section 4, which allows the Studentenwerke to be involved with other companies or to set up businesses itself.