Theresa Preston-Werner


Theresa (she/her) wears many hats. Anthropologist. Entrepreneur. Investor. Philanthropist. She has spent the past two decades working to understand global poverty and injustice and to support efforts on the ground aimed at transforming political, economic, and social systems in order to better the lives of individuals.

Theresa received her BA in Anthropology and Gender Studies from Scripps College and her PhD in Anthropology from Northwestern University. Her research focused on the development of enclave economies throughout Central America and the recent surge of international direct-sales companies in their wake. In particular, the work examined how companies are able to manipulate vulnerable populations, often poor, uneducated women and young, unskilled men. In the U.S. and abroad, Theresa has worked with, advised, and founded various non-profit and for-profit organizations in fields ranging from girls and education to women and family planning to youth and technology to the tech world and philanthropy.

Tom Preston-Werner


Tom (he/him) started his first business, Gravatar, in 2003 and sold it to Automattic in 2007. Since then he's created many open source projects that have changed the way developers work and are used in millions of open- and closed-source projects: Semantic Versioning, Jekyll, TOML, and many more.

In 2008 he cofounded GitHub which was bought by Microsoft in 2018. Tom's currently cofounder and Chief Product Officer at Chatterbug, the best way to learn a new language.

Amelia Abdelrazik

Learning & Impact Manager

Amelia (she/her) joined Preston-Werner Ventures in 2016; she leads our learning and impact efforts along with our grant making in public health.

She has a Master of Public Health in Maternal and Child Health from UC Berkeley and a BA in International Relations from Brown University. Prior to PWV, Amelia worked for a variety of organizations in the public health and international development fields, including Four Women Health Services (Massachusetts), (Canada), Tadwein Gender Research Center (Egypt), UC San Francisco (California), and Peace Corps (Botswana).

The initial phase of Amelia's career focused on community-level access to sexual and reproductive health information and services globally. Over time, she realized that reproductive rights must be achieved alongside economic and racial justice. To accomplish that, Amelia believes that we need to meet communities where they are. She loves helping organizations plan strategically for the greatest impact and systemic change.

Jake Werner

Director of Policy and Political Research

Jake (he/him) joined Preston-Werner Ventures in 2020. He leads research and strategy on funding political change with a particular emphasis on reshaping the global economy to combat climate change, extend investment to capital-starved regions, and democratize international relations. He has over a decade of experience in Chicago community organizing and international labor rights campaigns.

Jake received a BA in History and International Studies from Northwestern University and a PhD in History from the University of Chicago. Before joining PWV he taught Chinese history and social theory as a Harper-Schmidt Fellow at the University of Chicago. He writes on contemporary Chinese politics, US foreign policy, and progressive globalization, and his articles have appeared in Foreign Policy, The Nation, and Made in China.

Jae Pasari

Program Manager, Climate Action

Jae (he/him) joined Preston-Werner Ventures in 2020 as Program Manager for Climate Action. He leads research to identify high leverage climate investment opportunities in non-profit, political, and business spheres. Jae has over a decade of experience training individuals to evaluate and engage with environmental and social justice organizations.

Jae holds a BS in Molecular Environmental Biology from UC Berkeley and a PhD in Environmental Studies from UC Santa Cruz. Before joining PWV he was a senior research fellow at the University of California's Earth Futures Institute, where he focused on climate-themed video games and other experiments to engage humanity on the science, policy, and psychology of long-term sustainability. He has taught a wide range of science, environmental, and systems thinking courses at Portland State University, Berkeley City College, and Pacific Collegiate School. In addition to disciplinary publications, Jae's environmental research has been published in The Proceedings of the National Academy of Sciences, and his trainings are featured in books on both developmental psychology and environmental science pedagogy.

Rob Cameron

Developer in Residence

Rob (he/him) joined Preston-Werner Ventures in 2019. As the Developer in Residence he researches and builds out technologies needed for the Preston-Werner Ventures mission.

He has worked with computers for more than 20 years, starting out in the mid 90s as a self-taught web designer. He later moved to ColdFusion and created the ColdFusion on Wheels open source framework (still in active development). In the mid 2000s he moved to Ruby and Rails and now works primarily on RedwoodJS, an open source framework built on React and GraphQL.

Find him as @cannikin on Twitter and GitHub.

David S. Price

Developer in Residence

David (he/him) is a Developer in Residence, focusing on the alignment of innovation and human flourishing. He supports general initiatives and Hypothesis projects with an eye towards technology ethics, team formation, and expansion of product benefits across stakeholders.

Joining Preston-Werner Ventures in 2020, David has experience across industries as a multi-disciplinary entrepreneur. He has received medical device patents, acted as an Investment Bank CTO, and authored predictive models guiding $100s of millions in investment and R&D initiatives for the Fortune 50. He studied mechanical and biomedical engineering at the University of Colorado before graduate study in philosophy at Oxford.

The ebullient, happy center of his life includes his beautiful wife, twin daughters, and son. They are often adventuring together amongst the playgrounds, trails, and gardens of Golden Gate Park. Otherwise, he can be found on a bicycle wandering the hills of the Marin Headlands.

Twitter | GitHub

Silvia Hernandez

Program Officer, Bay Area Fund

Our family moved to San Francisco in 2004 where we lived in homeless shelters and received help from generous organizations and families. Through their efforts we were able to eventually afford an apartment and live without the worry of going hungry. We hope to use our position with Preston-Werner Ventures to give back to many of the groups who helped us along the way so they can continue helping families in situations similar to the one we found ourselves in. When we find the time to be together we like ordering cheeseburgers, watching movies, and browsing the internet for discount used cars. My pronouns are she/her.

Dahli Tutman

Program Officer, Bay Area Fund

Dahli Tutman (they/them or she/her) is a professional child-care provider and parenting consultant. She works with conscious parents to raise socially and ethically responsible adults. She believes strongly that our early experiences shape our ability to have, among other important qualities, confidence. The ability to have empathy and initiate social change is corelated to self-worth. Dahli believes our path to stopping social injustice is through radically innovative parenting. She says that power, greed, and evil are not innate human qualities, but learned or adopted from childhood trauma.

Dahli has explored other career paths like owning a ceramic art business called Butterscotch Clouds, doing creative store windows for the popular brand Antropologie and teaching art. In addition she maintains her membership at the Berkeley Potter’s Guild an art cooperative. However, for over 2 decades her passion is investing in the future via young minds. Several of her charges are young adults making socially impactful decisions through their careers, mindset and volunteer work. She’s a Dean’s list graduate of Mills College with a bachelor’s degree in studio art, but is always interested in self growth and education. She is currently building on her certificate in early childhood education by taking a teaching program at the Montessori Institute of Advanced Studies.

Brittani Harmeyer

Program Officer, Bay Area Fund

Brittani (she/her) is a Nanny working in San Francisco. She lives in Oakland with her girlfriend Lauren and cat Kurt. She is a proud lesbian and supporter of the LGBTQ community. As a child of divorce and OCD, she sought out healthy forms of expression by singing, dancing, acting, filmmaking, playing soccer, and joining a swim team. As an adult, her interests include gardening, bike riding, yoga, illustrating, and holistic remedies. She graduated from NYU in 2011 with a bachelors degree in Film and TV production. She is pursuing an online Yoga Teacher certification this fall with Yoga to the People San Francisco. She believes in the power of movement, creative expression, and nature as healing aids for both children and adults.

Claudia Rivas

Program Officer, Bay Area Fund

Greetings! I am Claudia Rivas (she/her) and I am Vegetarian Vegan Chef in the Bay Area. I have 7 years of professional work experience. I decided to go to the Natural Gourmet in New York City because it was one of the best vegetarian schools in the country.

Being vegetarian most of my life has felt like the perfect fit for me. I did my internship at Ravens Stanford Inn the was immediately hired long term. After a couple of years I was offered a position at Greens in the Marina in San Francisco and finally realized my dream of living and working in San Francisco. I worked my way up through the ranks of various restaurants and catering companies throughout the Bay.

I eventually became a private chef and entrepreneur owner of my own catering company called Señorita Vegerita. Through my catering company and private position I am blessed to be able to focus on plant-based food and no longer compromising my values.

I am passionate about teaching people just how delicious food can be when it's animal and cruelty free. I am dedicated to uplifting my black and brown community in Oakland through food health and nutritional education. I am also passionate about supporting female-led black and brown owned businesses. I look forward to helping my community grow and thrive.