ABOUT
We redefine success.
At Panthera Global, we are not a traditional CRO – and we don't aspire to be. We were born from a simple but urgent realization: clinical research deserves more agility, more alignment, and more accountability. Our model isn't transactional: It’s transformational.
Built by a team of highly experienced healthcare leaders, Panthera is reshaping how clinical trials are managed – from sponsor to site to subject – by enabling real-time data access and full research compliance. We partner with research sponsors and sites through a high-tech, integrated approach that removes barriers and accelerates outcomes without compromising scientific integrity.
Innovation in clinical research isn't just about the therapies we test – it's about how we work together to bring clinical trials to life. That's why we've built a leading, responsive operational structure designed to prioritize transparency, speed, and site-centric collaboration.
OUR CORE TEAM
Driven by people.
Built by experts.

FOUNDER & CEO
Dr. Guy W. Neff
A pioneer in clinical research leadership, blending decades of medical expertise with a bold vision to transform trial operations on a global scale.

CHIEF FINANCIAL OFFICER
Johanna Valentin
Operational strategist leading financial and regulatory execution, steering growth through insight, structure, and long-range planning.
CHIEF CLINICAL OFFICER
Julissa Taveras
Patient-centered leader advancing trial quality through deep clinical expertise and an unwavering commitment to research excellence.

SENIOR CLINICAL SAFETY ADVISOR
Claudia McGoldrick
Pharmacovigilance leader advancing clinical research through agile safety operations, regulatory expertise, and an integrated approach to patient safety and compliance.






