Charles Jonscher

Active Investor

Senior Partner, Health Practice at Clairfield International

Geneva, United Kingdom

Charles Jonscher, Senior Partner, Health Practice at Clairfield International is an active investor based in Geneva, United Kingdom. This profile covers what Charles Jonscher backs, at which stage, and how founders can reach out in 2026.

Dr. Charles Jonscher serves as Senior Partner at Clairfield International. Dr. Charles Jonscher is the Founder and serves as President at CET. He serves as Chairman at OncoCiDia. He served as Chief Investment Officer at Innoveas. He also served as a Board Member at Rubik's Brand. Mr. Jonscher has 30 years' experience in Corporate Finance and M&A. He became President of CET since 1990 and was a Partner at Booz Allen and Hamilton (1987-90). Mr. Jonscher holds a BA in Electrical Sciences from Cambridge University and an MA and Ph.D. in Economics from Harvard University.

Investor type: AngelPEInvestment Bank
Stages: Early Stage Venture
Invests in: FintechPaymentsHealthcare & BiotechBiotech & PharmaSaaS & EnterpriseConsumer & RetailConsumer Goods (CPG)Climate & Energy
Location: Geneva, United Kingdom
Typical check: $500K
Past investments: 1

Notable investments

OncoCiDia

How to reach Charles Jonscher

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Frequently Asked Questions

What does Charles Jonscher invest in?

Charles Jonscher invests in Fintech, Payments, Healthcare & Biotech and Biotech & Pharma, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.