Board of Directors

Mario Stark, MA

Chief Executive Officer

+41 79 542 88 74


Before joining Vivior, Mario served as CEO of multiple start-ups and worked on the executive level in large corporates in the medical device industry. He served on various boards of start-up companies in the area of medical devices, wearable sensors and digital health. Mario raised substantial funds from institutional and private investors. He also is a mentor for multiple start-ups in various industries.

Prof. Michael Mrochen, PHD

Chairman of the Board

+41 79 746 55 25


Michael is a serial entrepreneur and globally recognized ophthalmic scientist. He developed and commercialized multiple innovative ophthalmic technologies and procedures based on his unique ability to combine the technical, clinical and commercial worlds. He is a member of the board of directors for a range of companies and the executive committee of the Refractive Surgery Alliance and Swiss Eye Research Foundation.

Paul J. Soye, PHD, MBA

Member of the Board

+1 817 713 45 91


Paul is a seasoned business executive with substantial medical device, pharmaceutical and vision care experience. He is the former Global Head of R&D of Alcon’s Cataract Surgery Franchise based in Fort Worth, TX, USA. During his tenure at Alcon, he developed, clinically studied and launched multiple intraocular lens and surgical cataract products. Paul is the Founder of Hibernian Consulting LLC which provides expert knowledge and advice to vision care companies.

Guido Wietlisbach

Founder and owner of DSM-IKAO Schweiz, a premier dialogue marketing company. He is a manager and independent consultant at Guido Wietlisbach Dialog since 2014 and was CEO and Board Member in Wirz Wietlisbach Dialog AG. During his 30 years of experience in the field of dialogue marketing and he supported various industries: insurance, automotive, financial services, consumer goods, cosmetics, NGO/NPOs, retail, telecommunication and others.

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