Our independent certified experts for the persolog® Personality Factor Model
persolog Certification Partners
Discover the persolog® certification partners who independently organize and conduct certifications for our persolog models.
Markus Boxleitner
Markus Boxleitner, founder and managing director of Dreiflüsse Akademie, is a trainer through and through. Raised in the industrial sector, he knows all the tricks and challenges that matter in everyday leadership. Early on, he began pursuing his passion for training — first in technical fields and later as a business coach. His expertise is in demand not only throughout Germany but also internationally, including in Lisbon and the USA.
Dr. Marion Friedl
Marion Friedl, PhD in human biology and managing director of Dreiflüsse Akademie, mentored younger fellow students during her university years and later supervised numerous doctoral candidates at the universities of Munich and Halle (Saale). With her academic background in education and her training as a business coach, she brings a solid theoretical foundation to all her training programs and seminars.
Bernd Kollmann
"Learning by doing" has been the foundation of Bernd Kollmann’s training approach for over 25 years. As a trainer, coach, and speaker, he leads with great empathy. His ability to understand people, connect them, think outside the box, his confidence, and his genuine joy in his work form the core of his approach. From the very first moment, you’ll gain valuable input for achieving targeted training results. With numerous examples and practical tips, his trainings are dynamic and impactful.
Marion Masholder
Marion Masholder is an experienced executive coach and a recognized expert in organizational and leadership development, as well as a respected specialist in sales. With decades of experience in leadership roles and an extensive list of qualifications, she has built an excellent reputation.
Stefan Person
Stefan Person, co-founder of pt-training GmbH from Halle, is an entrepreneur with a passion for his work. Through dynamic training sessions and engaging workshops, he helps professionals and leaders become aware of their strengths and potential by reflecting on their own skills. Deep self-reflection is the foundation of every training session.