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

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Stacie Hudgens, MSc

Chief Scientific
& Strategy Officer

Fabian Cordova, CPA/MBA

Chief Executive Officer

Executive Director Team

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Claire Burbridge, MSc

Principal Scientific Advisor
COA

Helen Doll, PhD

Principal Scientific Advisor
Quantitative Science

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Jennifer Beaumont, MS

Executive Director
Quantitative Science

Amy Howerter, PhD

Executive Director
Prospective Studies

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Karen Kaiser

Executive Director
COA

Angie Viada, MS/PMP/CSM

Executive Director
Research Operations

Director Team

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Rebecca Cheng

Senior Director
Psychometrics

Lisa DeGisi

Senior Director
Human Resources

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Sam Rousell, MSc

Senior Director
Programming 

Diane Bock, BS

Senior Director
Study Coordination

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Sonia Arroyave

Director
Operations

Chloe Tolley

Senior Director
COA

John Caffrey

Senior Director
Finance & Procurement

COS Professionals

Flora Felix

Research Operations Associate
& Office Manager

Sondra Arvayo, BS

Finance Manager

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Megan McCool-Myers

Principal Scientist

Traci Abraham

Sr. Research Scientist

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Shruti Dave

Research Scientist II

Hollie Curgenven

Sr. Study Coordinator II

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Michael DeRosa, MA

Sr. Principal Scientist

Maria Melchiorre, BA

Sr. Finance/Accounts Manager

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Helen Jones

Associate Director, Operations

Sophie Hughes

Sr. Research Associate

Heli Kapadia

Sr. Research Scientist I

Shaunna Kowalewski, BS

Assoc. Director,
Compliance & Contracts 

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Elaine Langlais

Sr. Study Coordinator I

Lucy Lloyd-Price, MSc

Research Scientist II

Kerry Turner

Data Manager/Research Associate II

Swarna Nagiredla

Sr. Study Coordinator II

Jake Bourgaize, BSc/MSc/PhD

Sr. Research Associate

Sean Forrest, BA

Sr. Manager,
Content & Digital Marketing

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Hoan Do

Research Scientist II

Jennifer Clegg, MA

Associate Director II

Tenage McDowell

Research Scientist I

Bridget Iwamuro, BS

Sr. Study Coordinator II

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Cindy Umanzor-Figueroa

Research Scientist I

Lydia Raither, MSc

Research Scientist II

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Swetha Reddy, MS

Sr. Research Associate/Programmer II

Hailin Yu, MPH

Principal Scientist

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Kayleigh Majercak

Sr. Research Scientist I

Alyssa Bamer

Principal Scientist

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David Navarro, BS

Sr. Medical Writer I

Abi Okechukwu

Sr. Research Scientist II

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Neha Durgam

Research Scientist II

Karen McCormack

 Principal Medical Writer

Marisa Brimmer

Research Scientist II

Courtney Thompson

Principal Medical Writer

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Tanu Bhargava

Sr. Research Scientist I

Jessica Ortiz

Sr. Research Associate

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Claire Wenden

Associate Director
Project Manager

Edward Ramirez

Associate Director II
Study Coordination

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Skye Duarte-Colardelle

Research Associate II

Ya-Ning Chan

Research Scientist I

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Coleen Del Rosario

Sr. Research Associate I

Emma Coggins

SAS Programmer III

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Melanie Hughes

Research Associate I

Bill Gehringer, BS

Assoc. Director I / Data Mgmt.

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Lara Sams, MSc

Associate Director I

Natasha Schumacher

Sr. Study Coordinator I

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Tron Tran, BA

Operations Manager

Ibrahim Alfayoumi

Sr. Research Associate

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Christopher St. Clair

Sr. Principal Scientist

Joseph Gyorkey

SAS Programmer II

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Alivya Barry

Research Associate II

Peter McPherson, PhD

Principal Scientist

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Clara Garrison

Associate Director

Rasika Bombatkar

Research Associate II

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Elyse Ward

Project Manager

David Harvey

Operations Associate, UK

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Meet our Scientific Advisors

Scientific Board

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Competitive Advantage

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Discover our approach

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Our Careers

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Join the team

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Our DEI Charter

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Diversity & Inclusion