Dr. Lana Ott PhD. studied psychology with a specialisation in occupational, industrial and organisational psychology in Tbilisi and Wuppertal. Following completion of her doctorate she worked as a scientific officer in the Centre for Applied Psychology in Tbilisi, Georgia. The main focus of her activities lies in  psycho-diagnostic personality research and in the areas of human resources  and personnel consulting. She has worked in product development for persolog since 2004.

Renate Wittmann has a postgraduate university diploma in education. She studied educational science and andragogy (the science of adult education) in conjunction with psychology at the Otto Friedrich University in Bamberg. As the head of the development department for persolog GmbH in Remchingen, Germany, Renate Wittmann has been responsible for the further development and the scientific researching of persolog learning instruments since 2000. She works on the development and deployment of learning instruments in personnel and organisational development. As a member of the management team, she is familiar with questions of employee leadership and the everyday challenges of business operations through her own practical experience. Renate Wittmann is a master trainer for the persolog models and conducts certification, authorisation and qualification courses.