Our Team

Meet Crestone’s founders, senior management, and advisors.

Headshot of Urs Ochsner, Ph.D.

Urs Ochsner, Ph.D.

Co-Founder / CEO

With over 20 years of experience in infectious diseases, Dr. Ochsner is a co-founder and Vice President, R&D, and CEO at Crestone.

Headshot of Nebojsa Janjic

Nebojsa Janjic, Ph.D.


Previously a founder and CSO of Replidyne, Inc., Dr. Janjic is a co-founder and Chairman of the Board of Directors at Crestone.

Headshot of Thale Jarvis

Thale Jarvis, Ph.D.


With 25 years of experience in biotechnology, Dr. Jarvis is a co-founder, Science Advisor, and former Chief Scientific Officer at Crestone.

Headshot of John Rohloff

John Rohloff, Ph.D.


With 25 years of experience in Medicinal and Process Chemistry, Dr. Rohloff serves as Senior Chemistry Advisor at Crestone.

Headshot of Xicheng Sun, Ph.D.

Xicheng Sun, Ph.D.

Vice President

Prior to his current appointment, Dr Sun was an executive director of chemistry and CFTR modulator team leader at N30 Pharmaceuticals.

Headshot of Donald Morrissey, J.D.

Donald Morrissey, J.D.

Vice President

Vice President, Corporate Development at Crestone, Don brings over 20 years of experience as a business executive and attorney in the life sciences.

Headshot of Clifford Mason

Cliff Mason, Ph.D.

Associate Director, Pharmacology

Cliff has over a decade of professional experience in Pharmaceutical Sciences and has authored or co-authored over 20 peer-reviewed publications.

Headshot of Aline Oliver

Aline Oliver

Consultant, Regulatory Affairs

Aline Oliver is a Quality Assurance and Regulatory Affairs Consultant at Crestone and Owner/Principal Consultant for Oliver Consulting, LLC.

Headshot of Arlee Kachensky

Arlee Kachensky

Consultant, Quality Assurance

With expertise is in cGMP/GLP compliance, Arlee has worked in the pharmaceutical industry since 1986 and with Crestone since March 2020.

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John Bruss, M.D., M.B.A.

Medical Advisor

Dr. Bruss is an infectious disease specialist with over 20 years of experience in clinical drug development and research.

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William Bracken, Ph.D., DABT

Consultant, Toxicology

Bill had a lengthy career at AbbVie where he had management responsibilities for their drug development portfolio and marketed products.

Headshot of Wendy Ribble

Wendy Ribble, PMP

Associate Director, Program Management

Wendy brings over 20 years’ experience in the pharmaceutical and cleantech industries as both a research scientist and project manager.

Become a Part of Our Projects

Interested in helping further our research into novel antibacterial agents? We’d be thrilled to have your help, either as an investor, a team member, or a participant in our ongoing clinical studies.


Have a question or comment? Follow the link below to contact us about general inquiries.


Find work in a challenging, team-oriented environment with competitive salaries.

Clinical Studies

Learn how you can become part of our ongoing clinical study to fight deadly GI tract infections.