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 Directors

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Jennifer Beaumont, MS

Executive Director
Quantitative Science

Helen Doll, PhD

Principal Scientific Advisor
Quantitative Science

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Chloe Tolley

Executive Director
Qualitative Science

Angie Viada

Executive Director
Research Operations

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Amy Howerter, PhD

Executive Director
Research & Prospective Studies

Karen Kaiser

Executive Director
Qualitative Science

Directors

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Sam Rousell, MSc

Senior Director
Programming 

Christopher St. Clair

Senior Director 
Evidence Synthesis

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Diane Bock, BS

Senior Director
Study Coordination

Lisa DeGisi

Senior Director
Human Resources
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Christopher Diani

Senior Director
Data Mgmt & Compliance

Megan McCool-Myers

Director
Qualitative Science

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Sonia Arroyave

Director
Operations

Principle Scientists

Rebecca Cheng

Senior Principal Scientist
Psychometrics

Christine Yip

Principal Scientist
SAS Programiming

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Michael DeRosa, MA

Senior Principal Scientist
Quantitative Science

Hailin Yu, MPH

Principal Scientist
SAS Programming
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Alyssa Bamer

Principal Scientist
Quantitative Science

Peter McPherson, PhD

Principal Scientist
Qualitative Science

COS Professionals

Flora Felix

Research Operations Associate
& Office Manager

Sondra Arvayo, BS

Finance Manager

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Shruti Dave

Research Scientist II

Traci Abraham

Sr. Research Scientist

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Jake Bourgaize, BSc/MSc/PhD

Sr. Research Associate

Lucy Lloyd-Price, MSc

Research Scientist II

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Kayleigh Majercak

Sr. Research Scientist I

Lara Sams, MSc

Associate Director I

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David Navarro, BS

Sr. Medical Writer I

Alivya Barry

Research Associate II

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Neha Durgam

Research Scientist II

Clara Garrison

Associate Director

Marisa Brimmer

Research Scientist II

Elyse Ward

Project Manager

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Claire Wenden

Associate Director
Project Manager

Jessica Ortiz

Sr. Research Associate

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Ya-Ning Chan

Research Scientist I

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Hollie Curgenven

Sr. Study Coordinator II

Emma Coggins

SAS Programmer III

Coleen Del Rosario

Sr. Research Associate I

Helen Jones

Associate Director, Operations

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Maria Melchiorre, BA

Sr. Finance/Accounts Manager

Bill Gehringer, BS

Assoc. Director I / Data Mgmt.

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Sophie Hughes

Sr. Research Associate

Heli Kapadia

Sr. Research Scientist I

Melanie Hughes

Research Associate I

Elaine Langlais

Sr. Study Coordinator I

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Shaunna Kowalewski, BS

Assoc. Director,
Compliance & Contracts 

Kerry Turner

Data Manager/Research Associate II

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Swarna Nagiredla

Sr. Study Coordinator II

Hoan Do

Research Scientist II

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Sean Forrest, BA

Sr. Manager,
Content & Marketing

Tenage McDowell

Research Scientist I

Jennifer Clegg, MA

Sr. Research Scientist II

Cindy Umanzor-Figueroa

Research Scientist I

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Bridget Iwamuro, BS

Sr. Study Coordinator II

Natasha Schumacher

Sr. Study Coordinator I

Lydia Raither, MSc

Research Scientist II

Ibrahim Alfayoumi

Sr. Research Associate

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Tron Tran, BA

Operations Manager

Joseph Gyorkey

SAS Programmer II

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Abi Okechukwu

Sr. Research Scientist II

Rasika Bombatkar

Research Associate II

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Karen McCormack

 Principal Medical Writer

David Harvey

Operations Associate, UK

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Courtney Thompson

Principal Medical Writer

Tanu Bhargava

Sr. Research Scientist I

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Edward Ramirez

Associate Director II
Study Coordination

Skye Duarte-Colardelle

Research Associate II

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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