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Decades of experience across clinical research, workforce, and technology. 

Stack is unlocking the power of the clinical trials workforce; the people that enable the science that brings drugs, medical devices, and solutions to you...and us. We are participants and beneficiaries of clinical trials.  Already with the trust and partnership of some of the nation's top academic medical centers, this work is personal to us, and we are uniquely tasked to do it.

Meet the Team

Peggy LI

Peggy Yu

CEO & CoFounder


David Yourgrau

COO & CoFounder

And our mission and impact has attracted a robust & diverse clinical research team


Chinonso Singleton, MS

Clinical Operations Manager
  • Clinical Research Associate, ICON plc
  • Director of Clinical Research Training,
    DelRicht Research

Loralie Brennen, MS

Clinical Operations Program Lead
  • Director of Clinical Ops, Talaris Therapeutics & CRISPR
  • Manager, Clinical Research, Coordin

Iyore Ayaru,

Global Trial Manager, Bristol Myers Squibb
  • 18 years of clinical trial experience at AMCs and Industry
  • B.S. Chemistry and Health Disparities 
  • Fulbright Scholar