Christopher H. Müller,
Dr.sc.nat. ETH

Chairman of the Board,
Expert Consultant
+41 44 849 29 20

Dr. Müller received his doctorate in 2000 at the Swiss Federal Institute of Technology ETH. Dr. Müller is one of the leading Swiss experts in Usability and User Centered Design. He is founder and owner of The Ergonomen Usability AG.

Christopher Müller


Lukas Baenninger, Dr.phil.

CEO, Expert Consultant
+41 44 849 29 26

Dr. Lukas Baenninger studied psychology at the University of Zurich. He is an expert in developing strategies, innovation management, service design, user-centered design, and everything related to user experience.

Lukas Baenninger


Anne Bruseberg, PhD.

Dipl. Ing., Ergonomist,
Human Factors Expert
+41 44 849 29 29

Dr. Anne Bruseberg did her PhD in ergonomics in the UK where she worked for several years in a variety of projects in system ergonomics and Human Factors Integration. She also has a engineering degree in Arbeitsgestaltung (TU Dresden).

Anne Bruseberg


Mirjam Fuhrer, Dr.phil.

Usability & User Experience Consultant
+41 44 849 29 24

Mirjam Fuhrer studied social and business psychology at the University of Zurich. She specializes in perceptual psychology, applied cognition research and human factors in complex systems.

Mirjam Fuhrer


Philipp Baumann, Dr.phil.

Senior Usability & User Experience Consultant
+41 44 849 29 21

Philipp Baumann, Ph.D., studied psychology at the University of Bern and holds a federal diploma in ICT management. He is an expert for the design and evaluation of sociotechnical systems, quality development, and eye tracking.

Philipp Baumann


Klaus Heyden, M.Sc.

Senior Usability & User Experience Consultant
+41 44 849 29 22

Klaus Heyden studied Cognitive Ergonomics and Work Psychology (M.Sc.) at the University of Fribourg. He is specialized on usability evaluation and prototyping.

Klaus Heyden


Frank Leidermann, Dipl.-Inform.

Senior Usability & User Experience Consultant
+41 44 849 29 38

Frank Leidermann studied computer science at the University of Kaiserslautern. He is an expert in customer experience und product management, especially in agile environments (Scrum, SAFe, Lean UX).

Frank Leidermann


Elizabeth Immer-Bernold, MPhil

Senior Usability & User Experience Consultant
+41 44 849 29 30

Elizabeth Immer is a behavioral economist and expert in Behavioral Customer Experience. Her focus lies in modelling and measuring what people desire, do, and why they do what they do – for the sake of cost-effectively optimizing customer experiences.

Elizabeth Bernold


Andreas Schrafl – M.Sc.

Senior User Experience & Usability Consultant
+41 44 849 29 24

Andreas Schrafl studied psychology at the University of Zurich. He is an expert in system and interaction design and has broad experience in Lean UX and Human Centered Design.

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Agata Ilewicz, B.A.

Senior User Experience & Visual Design Consultant
+41 44 849 29 37

Agata Ilewicz studied Communication Design at the HTWG Konstanz. She specializes in the ergonomic design of user interfaces, prototyping and context analysis. 

Ksenia Fink


Daniel Senn,
Designer UAS

Usability & User Experience Consultant
+41 44 849 29 36

Daniel Senn studied Interaction Design at the Zurich University of the Arts (ZHdK). As a specialist in web and graphic design, he supports the Ergonomen with his expertise in interaction design and design in general.

Daniel Senn


Remo Bebié Gut, M.Sc.

Usability & User Experience Consultant
+41 44 849 29 21

Remo Bebié Gut studied Economics at University of Zurich and Climate Economics at University of Bern & ETH. He specializes in Behavioral Economics, Communications and Business Development.

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Ursina Jenny, B.A.

Usability & User Experience Consultant
+41 44 849 29 29

Ursina Jenny studied communication at the University of Zurich and also holds a Certificate of Advanced Studies in Usability & UX from the University of Applied Sciences and Arts Northwestern Switzerland. After gathering several years' experience working in content management, web analytics & SEO, she now focuses on user experience design, prototyping and usability testing.

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Corinne Reutimann,
M.Sc.

Usability & User Experience Consultant
+41 44 849 29 38

Corinne Reutimann holds a degree in psychology with a specialization in social psychology, decision science and economic psychology. Her focus lies in user research and customer experience design, analyzing the behavior of user and customers and translating the insights into actionables.

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Zuzanna Krzyzanska, B.Sc.

Usability & User Experience Consultant
+41 44 849 29 29

Zuzanna Krzyzanska earned her degree in architecture from the University of Fine Arts in Poznań. At the Ergonomen, Zuzanna specializes in design of user interfaces and translating visions into clear, understandable and inspiring experiences for users.

Zuzanna Krzyzanska


Rolf Wipfli, Dr. phil.

Usability & User Experience Consultant
+41 44 849 29 29

Rolf Wipfli holds a PhD in Psychology from the University of Geneva. Rolf works freelance for us. He is specialized in safety evaluation of medical software and devices, evaluation of usability, and requirements analysis.

Rolf Wipfli


Patricia Müller

CFO, Accounting
+41 44 849 29 25

Patricia Mueller manages everything related to HR, finances, taxes, insurance and more.

Patricia Mueller


Patrick Mattes

Digital/Graphic Designer
+41 44 849 29 29

Patrick Mattes creatively and competently supports the Ergonomen Usability AG freelancing in the field of digital and graphic design.

Patrick Mattes


Marianne Younanian

Recruiting
+41 44 849 29 29

Marianne Younanian assists The Ergonomen Usability AG in recruiting test subjects.

Marianne Younanian


Jeannine Müller

Recruiting
+41 44 849 29 29

Jeannine Mueller assists The Ergonomen Usability AG in recruiting test subjects.

Jeannine Müller