Meet the Team

Michael Greve

Portrait Michael Greve
CEO & Founder

Michael is one of the most successful founders of the German-speaking Internet industry.

Together with his brother Matthias, he created numerous ventures including and turned it into the largest last-minute travel site in Germany. Most notably, the brothers founded WEB.DE, and after a successful IPO, grew it into one of the country’s largest internet portals and online media businesses.

After the successful sale of his companies, Michael created the seed-stage venture capital investor Kizoo that came to fund and mentor some of Germany’s most promising tech startups including Babbel, Staffbase, and Mambu.

Forever Healthy started out more than a decade ago as a personal quest to shed the extremely unhealthy lifestyle he acquired while building WEB.DE, and over time turned into the focus of his entrepreneurial energy: To enable people to vastly extend their healthy lifespan and be part of the first generation to cure aging.

Initiatives of Forever Healthy include the evaluation of new rejuvenation therapies, evidenced-based curation of the world’s cutting-edge medical knowledge, the annual Undoing Aging Conference, funding research projects on the root causes of aging, and supporting the creation of startups turning that research into therapies for human use.


  • born in Hannover, Germany
  • high school diploma, Berghausen, 1981
  • Karlsruhe Institute of Technology, Electrical Engineering, Vordiplom in 1984
  • Founded Cinetic in 1987
  • Founded of WEB.DE in 1995
  • Founded in 1997
  • Founded Kizoo in 2007
  • Founded Forever Healthy Foundation in 2015

Frank Schueler

Portrait Frank Schüler

Frank Schueler is Chief Operating Officer (COO) of the Forever Healthy Foundation, board member of the SENS Research Foundation, Mountain View, CA and co-founder of the Undoing Aging conference.

Starting to work with Michael in 1999, Frank led the IPO of WEB.DE, co-founded the Kizoo Venture Capital business together with Michael and Matthias, and since then, helped numerous startups to grow. Among Frank’s other board-level assignments mostly at Kizoo portfolio companies, he is on the executive board of Atevia AG, a public company for 16 years and the Managing Director of Kizoo Technology Capital.

Previously, he was a strategy consultant with PriceWaterhouseCoopers. Frank holds a M.Sc. (New York) and a diploma in Business Administration and Engineering from Karlsruhe Institute of Technology (KIT), Germany.

Cari Green

Portrait Cari Green

Cari Green, MD is the Chief Medical Officer (CMO) of the Forever Healthy Foundation and leads our Rejuvenation Now and Maximizing Health initiatives.

Cari has long-standing expertise as a health consultant with clients in North America, Europe, and the Middle East and currently holds a license to practice medicine in Germany and Croatia as well as full GMC registration in the UK. In addition to conventional medicine, she has completed training in integrative/functional medicine as well as several manual and movement therapies including Rolfing, St. John’s Neuromuscular Therapy, Stott Pilates, Corrective Holistic Exercise Kinesiology and Gyrotonic/Gyrokinesis.

She did her MD at the University of Zagreb where she wrote her diploma thesis, “Environment Tauopathies – A Systematic Review” and worked as a language editor for the Translational Neuroscience Journal. She has also written a systematic review of international fever guidelines for the University Witten-Herdecke and served as an expert on an international committee on fever management.

Before entering medicine, Cari received her B.Mus (piano) from the Brandon University School of Music and studied dance in the B.F.A. program at York University in Toronto.

Heiko Schneefeld

Portrait Heiko Schneefeld

As Chief Services Officer (CSO) Heiko is responsible for developing technology, processes, and tools used by the foundation and our external partners.

Heiko has worked in leading positions in software development and management for 25 years and has built up various companies with a focus on digital services, several of them based in Asia.

He already got to know our company during his technical responsibility for the development of the financial center of AG. In this function, Heiko created the technical platform for the IPO of WEB.DE AG via the Internet in 2000, as well as for other major successful online placements, e.g. Deutsche Post AG.

Modern development procedures and technologies are tools for continuous organizational development, which Heiko is responsible for, as part of product development in service companies.
He has a degree in business information technology.

Matthias Hornberger

Portrait Matthias Hornberger

Matthias Hornberger is Chief Financial Officer (CFO) of the Forever Healthy Foundation and Managing Director at Kizoo Technology Capital.

He has been part of the senior management team of the group since the IPO of WEB.DE AG in 2000.

With his long-standing experience in the investment sector and his comprehensive knowledge of typical features of successful business models, he is a competent reference person for young founders. Matthias has extensive contacts in the high-tech industry and numerous local and national networks.

Before joining the group he had a career in Investment Banking. He studied Business Administration at Universities in Mannheim and Toronto (Dipl.-Kfm).