Harald Gabriel completed a commercial apprenticeship in sports and leisure management and worked from 1990 to 2000 as operations and regional manager of several leisure centres at GMF GmbH & Co. KG from 1990 to 2000. Since 2000, he has been personnel and project manager at GMF GmbH & Co. KG with a focus on operational organisation and personnel management. Since 2019, he has been an authorised signatory and member of the GMF management board as well as managing director of two subsidiaries of GMF’s own brand “vivamar”.