Provision of services in the field of assembly, disassembly, maintenance and servicing of building technical systems, as well as provision of related services in Switzerland and abroad, provision of services in the field of personnel leasing and provision of related services. May establish branches and subsidiaries in Switzerland and abroad, participate in other companies in Switzerland and abroad, conduct all business that is directly or indirectly related to its purpose, acquire, encumber, sell and manage real estate in Switzerland and abroad, arrange financing for its own account or for the account of third parties, and grant guarantees and sureties for subsidiaries and third parties.