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 Scientific & Strategy Officer
Fabian Cordova, CPA/MBA
Chief Executive Officer
Executive Director Team
Claire Burbridge, MSc
Principal Scientific Advisor
COA
Helen Doll, PhD
Principal Scientific Advisor
Quantitative Science
Jennifer Beaumont, MS
Executive Director
Quantitative Science
Amy Howerter, PhD
Executive Director
Prospective Studies
Karen Kaiser
Executive Director
COA
Director Team
Jason Randall, PhD
Senior Director
COA
Rebecca Cheng
Senior Director
Psychometrics
Sam Rousell, MSc
Senior Director
Programming
Lisa DeGisi
Senior Director
Human Resources
Diane Bock, BS
Senior Director
Study Coordination
Angie Viada, MS/PMP/CSM
Senior Director
Project Management
Sonia Arroyave
Director
Operations
Chloe Tolley
Senior Director
COA
John Caffrey
Senior Director
Finance & Procurement
COS Professionals
Flora Felix
Executive Assistant & Office Manager
Sondra Arvayo, BS
Finance Manager
Megan McCool-Myers
Associate Director II
Traci Abraham
Research Scientist II
Shruti Dave
Research Scientist II
Hollie Curgenven
Sr. Study Coordinator II
Michael DeRosa, MA
Prin. Scientist/Programmer III
Maria Melchiorre, BA
Sr. Finance/Accounts Manager
Helen Jones
Associate Director
Operations
Sophie Hughes
Sr. Research Associate
Heli Kapadia
Research Scientists II/Programmer
Shaunna Kowalewski, BS
Associate Director,
Compliance & Contracts
Elaine Langlais
Study Coordinator II
Lucy Lloyd-Price, MSc
Research Scientist II
Kerry Turner
Sr. Data Manager
Swarna Nagiredla
Sr. Study Coordinator II
Jake Bourgaize, BSc/MSc/PhD
Sr. Research Associate
Sean Forrest, BA
Sr. Manager,
Content & Digital Marketing
Hoan Do
Research Scientist II
Jennifer Clegg, MA
Associate Director II
Tenage McDowell
Research Scientist I
Bridget Iwamuro, BS
Sr. Study Coordinator II
Cindy Umanzor-Figueroa
Research Scientist I
Lydia Raither, MSc
Research Scientist II
Swetha Reddy, MS
Sr. Research Associate/Programmer II
Hailin Yu, MPH
Associate Director II/Programmer III
Kayleigh Majercak
Research Scientist II
Alyssa Bamer
Principal Scientist
David Navarro, BS
Medical Writer II
Abi Okechukwu
Sr. Research Scientist II
Neha Durgam
Research Scientist II
Karen McCormack
Principal Medical Writer
Marisa Brimmer
Research Scientist II
Courtney Thompson
Principal Medical Writer
Coleen Del Rosario
Sr. Research Associate I
Emma Coggins
SAS Programmer II
Melanie Hughes
Research Associate I
Bill Gehringer, BS
Associate Director I
Lara Sams, MSc
Associate Director I
Natasha Schumacher
Sr. Study Coordinator I
Tron Tran, BA
Operations Manager
Ibrahim Alfayoumi
Sr. Research Associate
Christopher St. Clair
Sr. Principal Scientist
Joseph Gyorkey
SAS Programmer I
Alivya Barry
Research Associate II
Peter McPherson, PhD
Principal Scientist
Clara Garrison
Associate Director
Rasika Bombatkar
Research Associate I
Elyse Ward
Project Manager
David Harvey
Operations Associate, UK
Jessica Ortiz
Sr. Research Associate
Marietta Imadojiemu
Research Associate II
Edward Ramirez
Associate Director II
Study Coordination
Tanu Bhargava
Sr. Research Scientist I
Ya-Ning Chan
Sr. Research Associate
Claire Wenden
Associate Director
Project Manager
Meet our Scientific Advisors
Scientific Board
Competitive Advantage
Discover our approach
Our Careers
Join the team
Our DEI Charter