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Norman Radtke is a longstanding member of the Gartner-Steffen Training and Development Team and took on the responsibility of the training business in the summer of 2017.

Ingrid Gartner-Steffen founding the Gartner-Steffen Institute for Personnel Development in 1994. Gartner-Steffen Coaching and Conflict Resolution Consulting was added as an independent Institute in 2017.

Jörg Schardin, born in 1965, is Trainer and Consultant in the Gartner-Steffen Training and Development Team.

Dr. Anusheh Rafi, born in 1973, is a trainer, mediator and consultant in the Gartner-Steffen Training and Development Team. He has been working as a lawyer.

Linde Engelhardt-Rafi, born 1980, works as a trainer and mediator in the Gartner-Steffen Personnel Development Team.

Petra Chauchot acquired her office and administrative skills and experience in secretarial and other related positions in a wide variety of organizations.

Annabelle Mallia, born 1977, is a trainer in the Gartner-Steffen personal development team.

Christoph Heydenbluth has been working in the field of human resources for several years and supports people from numerous industries, roles and responsibilities as an HR-professional and contract-based trainer, coach and mediator.

Melanie Grzesik-Kehren, born 1974, is a trainer, coach and Mediator in the Gartner-Steffen Training and Development Team .