Skip to content

Decades of experience across clinical research, workforce, and technology

We are participants and beneficiaries of clinical trials.  Stack's proprietary training, enhanced with an AI copilot to expedite knowledge access, will help the clinical research workforce accelerate answers for all populations through more efficient, productive, and speedy clinical trials. 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

Clinical Research Instructors

We have a team of experienced clinical research subject matter experts working as curriculum designers and instructors.


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
  • 18 years of clinical trial experience at AMCs and Industry
  • B.S. Chemistry and Health Disparities 
  • Fulbright Scholar