Our Team

Headshot of Acuity Eye Group co-founder Tom Chang MD smiling on a grey background

Tom Chang, MD

Founder & Managing Partner

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Headshot of Acuity Eye Group co-founder Michael Samuel smiling on a grey background

Michael Samuel, MD

Founder & Chief Medical Director

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Education & Innovation

Michael Davis, retina specialist at Acuity Eye Group

Michael Davis, MD

Fellowship Educational Director

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alan guagliardo acuity eye group

Alan Guagliardo

Chief Strategy & Innovation Officer

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Pia Rios

Executive Director

Clinical Operations

Alexander Macbeth - Vice President of Operations at Acuity Eye Group

Alex Macbeth

Vice President, Operations

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Patti Whisler

Senior Director, Operations

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Christina Cruz

Director, Field Operations - Orange County

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Christina De Hoyos

Director, Field Operations - San Diego County

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Josh Eddy

Director, Field Operations - LA County

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Robert Miller, Director of Field Operations at Acuity Eye Group

Robert Miller

Director, Strategic Partnerships

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Clinical Engineering, Research & Development


Stephen Duncan

Vice President, Engineering

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David Floyd Research & Development at Acuity Eye Group

David Floyd

Vice President, Research & Development

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Headshot of James Lin, Director of IT at Acuity Eye Group

James Lin

Director, IT

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Brett Harris

IT Services Manager

Stephen Jewell of Acuity Eye Group

Stephen Jewell

Systems Administrator

Nathan Lowry at Acuity Eye Group

Nathan Lowry

Principal Data Scientist

Micah Gordon at Acuity Eye Group

Mirah Gordon

Research & Development Co-Op Student


Rich Marotti Chief Compliance Officer At Acuity Eye Group

Rich Marotti

Chief Compliance Officer

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Terry Marchillo at Acuity Eye Group

Terry Marchillo

Contracts Manager

Marie Sakounphong of Acuity Eye Group

Marie Sakounphong

Compliance Manager


Ki Yom CFO of Acuity Eye Group

Ki Yom

Chief Financial Officer

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Alenoosh Namagerdi of Acuity Eye Group

Alenoosh Namagerdi

Director, Revenue Cycle

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Samantha Hofstad of Acuity Eye Group

Samantha Hofstad Chi


Siyouneh Torousian of Acuity Eye Group

Siyouneh Torousian

Revenue Cycle Manager

Enriqueta Cortes

Enriqueta Cortes

Revenue Cycle Manager

Human Resources

Celia Leung Director of HR

Celia Leung

Director, Human Resources

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Sheri Alley Credentialing Department of Acuity Eye Group

Sheri Alley

Director, Credentialing

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Arcy Bumgarner Payroll Manager

Arcelia Bumgarner

Payroll Manager

Winnie Chan

Winnie Chan

Human Resources Generalist


Kathy Peysar

Corporate Recruiter


Acuity Eye Group VP of Marketing Laura Rod

Laura Rod

Vice President, Marketing

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Angie Berber Director of Call Center

Angie Berber

Director, Contact Center

Leadership Headshot Stand-In

Alex Fuentes

Call Center Manager

Brittnie Salazar Acuity Eye Group

Brittnie Salazar

Senior Marketing Specialist

Clinical Research

Lernik Davoudi Clinical Research At Acuity Eye Group

Lernik Davoudi

Clinical Research Manager

Minerva Garcia Research at Acuity Eye Group

Minerva Garcia

Clinical Research Coordinator

Victoria Ramirez Research at Acuity Eye Group

Victoria Ramirez

Clinical Research Coordinator

monica chavez acuity eye group research

Monica Chavez

Clinical Research Asisstant

Ambulatory Surgery Centers

Erica Ayala Ancillary Services At Acuity Eye Group

Erica Ayala

Ancillary Services Manager

Susi Khan Director of Nursing

Susi Khan

Director of Nursing

Nancy Montigny

Nancy Montigny

Director of Nursing