The core activity of ProBAS GmbH is the provision of services in the field of construction and infrastructure projects, particularly in Switzerland. The activities include, among others: project execution management, owner representation, facility management, access to rail infrastructure, construction site safety in and around rail infrastructure, switching and earthing of rail power systems, and security services, such as safety delegates and safety officers for rail infrastructure facilities. The company also offers rental products and GFK products and has a nationwide network in Switzerland.