- Management assistant in real estate (1987)
- Qualified human resources adviser (DGFP, 2002)
- Business organization assistant (Chamber of Industry and Commerce, 2004)
- Management trainer, change manager, process & human resources trainer (Cicero, 2002)
- Licensed "LIFO" method analyst (LIFO, 2006)
- Changesetter license (Cicero, 2013)
- 1984 - 1987 Management assistant in real estate (at Heinz Besser, architect, Lübeck)
- Setup & management of a software company with over 300 employees (10 years)
- Setup & management of a psychological practice with neurological feedback training for adults, as a support method for AD(H)S, stress, burnout syndrome, and other conditions
- IT development and consulting (until 2004)
- Since 1990 Self-employed consultant with several main areas
- Commerce & industry
- New energies
- Construction and properties
- Banks and insurances
- Telecommunication
- Healthcare and social services
- Education and training
- Software changeovers / management principles
- Management principles / cascade principle