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

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

Meet our Scientific Advisors

Scientific Board

Competitive Advantage

Discover our approach

Our Careers

Join the team

Our DEI Charter

Diversity & Inclusion