Behind COS:
Meet the Experts
Our team combines decades of expertise with innovative approaches to deliver customized solutions that capture the patient’s voice in healthcare research.
Board Leadership Team
Stacie Hudgens, MSc
Chief Executive Officer
Fabian Cordova, CPA/MBA
Chief Operating Officer
Executive Director Team
Claire Burbridge, MSc
Principal Scientific Advisor,
COA
Helen Doll, PhD
Executive Director,
Quantitative Science
Jennifer Beaumont, MS
Executive Director,
Quantitative Science
Director Team
Jason Randall, PhD
Senior Director,
COA
Sam Rousell, MSc
Senior Director,
Programming
Diane Bock, BS
Senior Director,
Study Coordination
Lisa DeGisi
Senior Director,
Human Resources
Angie Viada, M.S./PMP/CSM
Senior Director,
Project Management
Sonia Arroyave
Director,
Operations
Chloe Tolley
Senior Director,
COA
Amy Howerter, PhD
Senior Director,
Prospective Studies
Rebecca Cheng
Senior Director,
Psychometrics
Alex Barsdorf, PhD
Senior Director,
COA
COS Professionals
Megan McCool-Myers
Associate Director II
Traci Abraham
Research Scientist II
Angela Stroupe, MA
Senior Research Scientist II
Elliott Blatt
Research Scientist I
Shruti Dave
Research Scientist II
Hollie Curgenven
Senior Study Coordinator I
Emma Coggins
SAS Programmer II
Coleen Del Rosario
Senior Research Associate I
Michael DeRosa, MA
Prin. Scientist/Programmer III
Maria Melchiorre, BA
Sr. Finance/Accounts Manager
Helen Jones
Operations Manager
Sophie Hughes
Senior Research Associate
Elaine Langlais
Study Coordinator II
Shaunna Kowalewski, BS
Associate Director I,
Compliance & Contracts
Heli Kapadia
Research Scientists II/Programmer
Lucy Lloyd-Price, MSc
Research Scientist II
David Navarro, BS
Medical Writer 2
Sean Forrest, BA
Senior Manager,
Content & Digital Marketing
Hoan Do
Research Scientist II
Jennifer Clegg, MA
Associate Director II
Teenage McDowell
Senior Research Associate
Bridget Iwamuro, BS
Senior Study Coordinator II
Shannon Vaffis, PhD/MPH
Research Scientist II
Hailin Yu, MPH
Associate Director II/Programmer III
Joseph Gyorkey
SAS Programmer I
Alivya Barry
Research Associate II
Peter McPherson, PhD
Principal Scientist
Jake Bourgaize, BSc/MSc/PhD
Senior Research Associate
Clara Garrison
Associate Director
Sondra Arvayo, BS
Finance Manager
Flora Felix
Executive Assistant & Office Manager
Melanie Hughes
Research Associate I
Bill Gehringer, BS
Associate Director I
Swarna Nagiredla
Senior Study Coordinator II
Kerry Turner
Senior Data Manager
Lydia Raither, MSc
Research Scientist I
Cindy Umanzor-Figueroa
Research Scientist I
Lara Sams, MSc
Associate Director I
Natasha Schumacher
Study Coordinator II
Tron Tran, BA
Operations Manager
Swetha Reddy, MS
Senior Research Associate/Programmer II
Alyssa Bamer
Principal Scientist
Ibrahim Alfayoumi
Senior Research Associate
Meet our Scientific Advisors
Scientific Board
Competitive Advantage
Discover our approach
Our Careers
Join the team
Our DEI Charter