05/12/2015 Barrier-free version Search Contact Sitemap Online search Home page Competence center Organizational and financial management staff You are here: Home Management service GBG's Management Service is responsible for managing the company and supporting the operational business areas. This includes organizational and financial management, personnel and a competence center. Business area manager: Mag. Günter Hirner Tel .: +43 316 872-8600 Fax: +43 316 872-8609 E-Mail: guenter.hirner@gbg.graz.at Font size: A A A System: ico »enterprise.cms GBG Building and Construction Management Graz GmbH