CHPR is home to a robust and diverse staff with extensive administrative and/or research expertise. CHPR staff offer a wide range of knowledge and experience in various research methods, policy analysis and research administration. They have diverse academic and professional backgrounds in public health, sociology, psychology, statistics, economics, and communications. The majority of CHPR staff members have advanced degrees, including doctoral degrees. This transdisciplinary team provides unique in-house support for faculty with diverse research needs.

UC Davis students also work on CHPR research projects. Our undergraduate student research assistant program provides inspiration for students to enter careers in healthcare and health services research.

Administrative Staff

CHPR administrative staff members assist faculty researchers with a variety of research-related tasks that include:

  • identifying appropriately skilled, available CHPR staff for research projects
  • managing human resource issues
  • maintaining compliance for grant and human subject reviews
  • managing project budgets
  • identifying funding opportunities for faculty members and assisting with grant proposal preparation

For more information about the services provided by our administrative staff, please click on the following links:

Research Staff

CHPR research staff members are highly flexible and versatile, capable of utilizing multiple research methods to conduct various types of studies (e.g., randomized-controlled trials, cohort studies, research employing simulated patients, qualitative analyses, survey research, etc.) to address a broad range of research questions. Staff members—statisticians, health policy analysts, qualitative researchers, project managers, etc.—work on research teams led by CHPR faculty.

CHPR project managers manage a variety of projects, including multi-site, randomized controlled trials, systematic reviews, and qualitative investigations, that involve complex data analyses. Project managers work with researchers at UC Davis and other institutions to optimize project resources, supervise research staff, develop study recruitment and enrollment protocols, manage IRB submissions and modifications, and prepare research manuscripts and reports.

CHPR’s health policy analysts conduct systematic and rapid evidence reviews. These analysts also staff the California Health Benefits Review Program (CHBRP) projects, providing rapid (within 60 days) medical effectiveness and public health impact analyses of proposed health insurance legislation for the California State Legislature. Health policy staff members also give annual guest lectures on health policy topics to first- and second-year medical students and for the MIND Institute, and also train UC colleagues in conducting systematic reviews

CHPR has staff expertise in ICD-9-CM and ICD-10-CM/PCS coding and has provided support for the AHRQ Quality Indicators conversion project and for development/implementation of the Centers for Disease Control and Prevention (CDC) morbidity surveillance measures for ICD-10-CM/PCS. Staff have also reviewed indicator specifications to support proposed ICD-10 maps as participants on expert panels.

Led by Professor Daniel Tancredi, CHPR statisticians assist researchers in developing effective study designs and analytic plans for clinical research studies including cluster-randomized trials, longitudinal studies, and surveys that use complex, probability sampling techniques. They conduct complex analyses of large datasets including national, state, and insurance datasets. They have experience with a wide variety of biostatistical, psychometric, and econometric applications, including instrument development and validation and the specification and interpretation of regression models for multilevel, time-series, and panel data.

CHPR’s qualitative research team members, trained and led by Melissa Gosdin, Ph.D., work with principal investigators within the Schools of Medicine and Nursing, and on the main UC Davis campus, investigating a wide variety of topics. Specific studies focusing on doctor/patient interactions, opioid tapering, barriers and facilitators to improving healthcare delivery, social isolation and its relationship to chronic pain, life context in primary care, sexual assault and HIV prevention, smoking cessation, collaborative depression care, and impacts of COVID-19 on frontline physicians are examples of current and recent research conducted by our qualitative team.

CHPR’s research assistants develop and conduct in-person and telephone surveys, and collect, enter and analyze data. Some are experienced in:

  • training and managing simulated patients
  • recruiting and enrolling diverse patient populations
  • engaging research subjects in a variety of interventions

Current Staff

Administrative Staff

Michael Webster

Michael Webster, B.S.

Chief Administrative Officer

Beatrice Le

Beatrice Le, B.S.

Research Administrator

Kirstin Truitt

Kirstin Truitt, B.S.

Administrative Officer

Bill Daehler's photo.

Bill Daehler, M.A.

Digital Communications Specialist

Belinda Martineau

Belinda Martineau, Ph.D.


Supervising Staff

Melissa Gosdin's photo.

Melissa Gosdin, Ph.D.

Qualitative Research Analyst; Supervisor

Dominique Ritley's photo.

Dominique Ritley, M.P.H.

Senior Health Policy Researcher; Supervisor 

Meghan Weyrich's photo.

Meghan Weyrich, M.P.H.

Health Policy Analyst; Supervisor

Health Policy Staff

Ryan Ciuffetelli

Ryan Ciuffetelli, M.A.

Project Policy Analyst

Marykate Miller

Marykate Miller, B.S., M.S.

Health Policy Analyst

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Chouatong Mouavangsou, B.S.

Project Policy Analyst

Katrine Padilla

Katrine Padilla, M.P.P.

Project Policy Analyst

Clinical Research Staff

Bethney Bonilla

Bethney Bonilla, M.A.

Clinical Research Analyst

Camille Cipri

Camille Cipri, B.S.

Clinical Research Analyst

Shao-You Fang

Shao-You Fang, Ph.D.

Data Systems Analyst



Photo of Margaret Fix 

Margaret Fix, M.P.H.

Clinical Research Analyst


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Julia Huerta, B.S.N., R.N., M.P.H.

Clinical Research Analyst

John Kennedy

John Kennedy, C.D.I.P., C.C.S.

ICD Clinical Coding Expert

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Carrie Lewis, M.P.H.


Sabrina Loureiro

Sabrina Loureiro, B.S.

Project Policy Analyst II

Hiba Naz

Hiba Naz, B.S.

Project Policy Analyst II

Andrew Padovani

Andrew Padovani, Ph.D.


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Irina Tokareva, R.N., B.S.N., M.A.S., CPHQ

Quality Measurement Clinician Researcher

Gary Weinberg

Gary Weinberg

Survey Researcher

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Guibo Xing, Ph.D.

Principal Statistician

Centers at CHPR Staff

CA Quits Staff

Cindy Valencia

Cindy Valencia, M.P.H., Ph.D. 

Operations Director; CA Quits Program

Cynthia Vela

Cynthia Vela, B.S.

Project Manager; CA Quits Program

Shannon Haggitt

Shannon Haggitt, B.A., M.S.W.

Project Policy Analyst; CA Quits Program

Moreen Sharma

Moreen Sharma, B.S.

Project Policy Analyst; CA Quits Program

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Tasleem Chechi

Project Policy Analyst; CA Quits Program

Rebecca Hsieh

Rebecca Hsieh, B.S.

Communication and Education Coordinator; CA Quits Program

Prevention Policy & Practice Group Staff

Desiree Backman

Desiree Backman, Dr.P.H., M.S., R.D.

Chief; Prevention Policy & Practice Group

Neal Kohatsu

Neal Kohatsu, M.D., M.P.H., FACM

Chief Health Strategist; Prevention Policy & Practice Group

Camlyn McCracken

Camlyn McCracken, B.S.

Community Liaison; Prevention Policy & Practice Group

Crystie Dao

Crystie Dao, M.S.

Communications Specialist; Prevention Policy & Practice Group

Xinran Dhaliwal

Xinran Dhaliwal, M.P.H.
Quality Improvement Specialist

 Julia Fleuret

Julia Fleuret, M.P.H.
Clinical Epidemiologist