Our Team

andrew headshot.jpg

Andrew Balcazar

Recruitment Assistant

he/him/his

Andrew received his BS in Public Health from San Francisco State University as well as a BA in Music. He currently works at CSUH as a Recruitment Assistant. He plans to pursue a Master's in Public Health and continue his work towards health equity and social justice. In his free time, he enjoys live music, all things pop culture and brewing kombucha at home.

Phillip_Coffin.jpg

Phillip Coffin, MD, MIA,

FACP, FIDSA

Director

he/him/his

Phillip is a board-certified and practicing internist, infectious disease specialist, and addiction medicine specialist. He attended or trained at Brown University, Columbia University, the University of California San Francisco, and the University of Washington.

Full bio

DPH photo (002).jpg

Savanna Harris

Research Associate

she/her/hers

Savanna received a Bachelor of Arts in Global Studies from the University of California, Berkeley. Before joining the CSUH team as a Research Associate on the PRIME Study, Savanna worked in harm reduction in both as a medical assistant and as a health worker coordinator. In her free time, Savanna enjoys volunteering as a birth doula, drawing and baking. 

kaleas head shot.jpg

Kaleas Johnson, MA

Clinical Research Program Manager

she/her/hers

Kaleas received a BA in Human Services and a Master's Degree in Counseling Psychology from Holy Names University.  She has managed programs in substance use treatment and projects in various areas of research including the genetics of addiction, PTSD and cardiovascular disease, oncology and pediatric epilepsy.  Kaleas enjoys taking scenic walks and hikes, trying new cuisine and spending time with family. 

margarita headshot.jpg

Margarita Martin, M.Sc, B.Pharm

Grants & Operations Manager

she/her/hers

Margarita is the Grants and Operations Manager at CSUH and she supports and performs complex grant administration for multiple branches within the Population Health Division at SFDPH. She received her Master of Science from the UCM in Pharmaceutical Sciences and her certificate in Clinical Trials from the San Francisco State University. Margarita speaks English, Spanish, French and Italian and loves soccer.

MM.JPG

Matthew McLaughlin

Research Associate
he/him/his

Matthew graduated from Harvard with a BA in Chemistry before joining CSUH as a Research Associate. He has conducted lab-based HIV and Hepatitis research and is generally interested in sexual and gender minority health. He loves to stay active, and his favorite sport to play is tennis.

IMG-0772.jpg

Paul Rueckhaus, MA, MPH

Recruitment Assistant

he/him/his

Paul has been bouncing around the wonderful world of public health for 20 some years. He's been teaching public health, human sexuality and English at San Francisco State, City College of San Francisco and the San Mateo Community College District for the last 10 years. He's returning to his "harm reduction roots" at CSUH while he completes his associates degree in registered nursing at City College of San Francisco.

Reva.jpg

Reva Swiedler

Research Associate

she/her/hers

Reva received her BA in Global Studies from Drexel University before joining CSUH as a Research Associate. She is interested in improving cultural competency and access to care in public health. In her free time, she can be found gardening, cooking, collaging, playing soccer, or listening to music in Spanish.

profile picture.jpg

Brian Wylie, OTD, MPH

Program Director
he/him/his

Brian is a San Francisco and Bay Area native. He received a BA from UC Berkeley, an MPH from Harvard, and a Doctor of Occupational Therapy from USC. When not he’s not at work he likes to write. Maybe someday all his writing will culminate in a book! But just maybe.

Augustin Photo CSUH.jpeg

Augustin Beall

Research Associate

he/they

Augustin graduated from Oberlin College with a BA in English. He recently completed a pre-medical post-bac in the basic sciences at Mills College, and has been volunteering as an STI medic with The Gay Men’s Health Collective through Berkeley Free Clinic. He has vague but persistent philosophical interests in desire, decision-making and the alienating forces of capitalism, and a strong faith in the principles of harm-reduction and community-health. He apologizes ahead of time for his unsolicited mediocre singing any time you say a word that reminds him of a song he likes, but he invites you to sing along with him.

johnf.jpg

John Farley

Recruitment & Community Relations Manager

he/him/his

John graduated with an AS in business from Cape Cod Community College. John began work with SFDPH in 2004 and completed his BA in Sociology. He has a strong passion for working in the HIV-care field and creating better health outcomes for substance users. John loves film. His all-time favorite movie is ‘Mary Poppins’ and his favorite actors are Reese Witherspoon, Timothee Chalamet and Lucas Hedges.

NimahPic.jpg

Nimah Haq

Research Data Administrator

she/her/hers

Nimah received her Master of Public Health degree from the University of Southern California. She began working at CSUH soon after graduation. She would like to continue to work in public health and clinical research, more specifically in the biostatistics and epidemiology fields. Nimah loves to learn different languages and is fluent in Hindi and Urdu, and she is currently learning Spanish and Arabic.

IMG_2083.JPG

Irene Liu

Research Associate 

she/her/hers

Irene graduated from UC Berkeley with a BA in Molecular & Cell Biology and Public Health. She currently works as a research associate on opioids studies for CSUH, and is passionate about whole-person health, community outreach, and harm reduction. She has a newfound interest in baking, and is currently making her way through a 25 lb bag of flour.

Rebecca pic.jpg

Rebecca Martinez, FNP
Research Clinician
she/her/hers

Rebecca is a board-certified family nurse practitioner, who completed her Master’s of Science in Nursing at UCSF in 2014. She has made her professional home at the intersection of HIV prevention, harm reduction, and primary care, and is energized by her community on a daily basis. Rebecca lived in Spain when she was 14 with her family and blames her parents for her ongoing wanderlust.

blue-watercolor-background-with-waves-ve

Vanessa McMahan, PhD

Research Scientist
she/her/hers

Vanessa is a Research Scientist at CSUH. She received her doctorate and Master of Science from the University of Washington in Health Services. She is dedicated to harm reduction and evaluating programs to improve well being among marginalized communities. Previously, Vanessa coordinated PrEP studies among people who use methamphetamine and has volunteered with syringe services programs since 2000.

Full bio

HS_Santos.jpg

Milo Santos, PhD, MPH

Senior Research Scientist
he/him/his

Milo is a Senior Research Scientist at CSUH and an Associate Professor in the Department of Community Health Systems at the University of California San Francisco (UCSF). He obtained his Ph.D. in Epidemiology and Translational Sciences at UCSF and his MPH in Epidemiology and Biostatistics at the University of California Berkeley.

Full bio

bunny headshot.jpg

Bunny Ryder, DNP, PHN,
FNP-C

Research Clinician
they/them

Bunny is a board-certified Family Nurse Practitioner. They completed their Doctorate in Nursing Practice in 2018 from Samuel Merritt University with a focus on sexual and reproductive health education for former foster transitional-age youth (TAY). Bunny is a former foster youth and advocate. They are non-binary and have an interest in transgender and gender non-conforming equity. Bunny enjoys climbing, roller skating, snuggling their chihuahua, and supporting local artist in their downtime.

Petal photo.jpg

Petal

Canine Clinician

she/her/hers

Petal’s research interests include determining canine tolerability of squeak versus crinkle toys and cheese versus other treats. Her favorite toy is a round, squeaky gingerbread man who lost his nose on the first day. In her spare time, Petal likes to lick her Dad’s head.

blue-watercolor-background-with-waves-ve

Sarah Brennan

Research Associate

she/her/hers

Sarah received her BA from UC Berkeley in interdisciplinary studies. She has been working and volunteering in harm reduction for six years and has been a Research Associate at CSUH for three. Sarah once encountered a turtle in the desert who tried to eat her shoelace. It is the closest she has ever come to being attacked by a wild animal.

DSC_0326_COLOR (002).jpg

Annie Fraser

Research Associate

she/her/hers

Annie graduated from Georgetown with a BS in Global Health before joining CSUH as a Research Associate. She is passionate about harm reduction and sex worker rights, and previously worked at HIPS in Washington DC and the Women's Community Clinic in San Francisco. Her favorite things are, in order: her fish (5 tanks currently), her poison dart frogs, egg salad sandwiches, and small versions of large things.

Ikeda headshot 1.jpg

Janet Ikeda, MA

Clinical Research Program Manager 

she/her/hers

Janet received her Masters of Education from Stanford University and trained at the Center for AIDS Prevention Studies at UCSF. Janet went to Guatemala on a Fulbright Scholarship and then became a fellow at the CDC outpost at the Universidad del Valle studying the TB and HIV pandemics in rural Guatemala. 

Full bio

XLM_Headshot.jpg

Xochitl Luna Marti, MPH

Clinical Research Program Manager

she/her/hers

Xochitl received her BA in Health and Societies and Master of Public Health from the University of Pennsylvania. Previously, she worked as a Research Coordinator for Penn’s Center for Public Health Initiatives, contributing to various projects on digital health privacy, adolescent health, and harm reduction. In her free time, Xochitl enjoys outdoor activities and Latin dancing.

Tim headshot.jpg

Tim Matheson, PhD, MS

Intervention Director/

Counseling Supervisor

he/him/his

Tim is a clinical psychologist who has been employed at SFDPH for the past 18 years. Tim has a BA from the University of Denver, MS in clinical psychology from SF State University, and a Ph.D. in Clinical Psychology from the Center for Psychological Studies. Tim can be found outdoors engaged in some physical activity: hiking, backpacking, camping, bicycling, kayaking, paddle-boarding, rafting, downhill and x-country skiing, snowshoeing, ice skating, sledding, etc.

Full bio

mackenzie headshot.jpeg

Mackenzie Robinson

Research Associate
she/her/hers

Mackenzie graduated from UCLA with a BA is Psychology and Global Health before eventually joining CSUH to work on the REBOOT study. She hopes to attend graduate school for social work and continue to work in the public health sphere. Mackenzie is an avid baker and dancer and has near encyclopedic knowledge of the beauty industry. 

A590F696-7539-47D8-9FDB-BAB2C5320BC0.jpe

Claire Schutz
Research Program Assistant
she/her/hers

Claire graduated from UC Berkeley with a BA in Public Health and Public Policy. She currently works on the CIAO project at CSUH. She is passionate about health equity, her dogs, and a good coffee.

blue-watercolor-background-with-waves-ve

John Walker, MSN, FNP-C
Research Clinician
he/him/his

John is a research clinician at CSUH. He earned his Masters of Nursing at Samuel Merritt University in 2013 and is a board-certified family nurse practitioner. His interests include working with marginalized populations to improve their outcomes regarding substance use and access to health care. He also works to reduce the stigma associated with drug use. John has a 5-year-old Miniature Pinscher, Petal, who is the apple of his eye.