Meet the Team

Walk SF’s work is powered by our passionate staff, Board of Directors, Advisory Council, volunteers, and members.

Learn more about our:

• Staff
• Board of Directors

Become a member, explore volunteer opportunities, or check out job and internship opportunities.

Staff & Interns

Kathleen Brennan, Development Director
pronouns: she/her

Kathleen oversees fundraising for Walk San Francisco. She has over 15 years of fundraising experience, focused on supporting San Francisco nonprofits. Most recently, she was Development Director at Voice of Witness and has also worked in development at SFMOMA and the Fine Arts Museums of San Francisco.

Kathleen is a Bay Area native who loves spending her free time hiking and exploring the streets of San Francisco with her dog. Favorite places to walk include Golden Gate Park, the hidden stairways of Bernal Heights, and any trail that leads to a view of the ocean.

Contact Kathleen at kathleen@walksf.org.

Dorothy Curran-Muñoz
pronouns: she/her

Dorothy is growing the movement for safe streets in a variety of ways: working with kids and schools as part of the SF Safe Routes to School Partnership; helping neighborhood groups and residents identify and win pedestrian safety improvements; plus supporting Walk SF’s core advocacy campaigns. Dorothy holds B.A.s in International Studies and East Asian Languages & Culture from Indiana University, where she also discovered her passion for championing accessibility to the outdoors through collegiate bike racing.

From grassroots organizing for environmental justice in Cambodia, to researching toxic water issues in Indiana, Dorothy’s previous roles have led her to a deep appreciation for listening to and amplifying community voices. Outside of office hours, you can find Dorothy exploring Northern California on her bike, baking for friends, or with her watercolor palette at the park.

Contact Dorothy at Dorothy@walksf.org

Sam Greenberg
pronouns: he/they

Sam leads Walk SF’s advocacy team, motivated by the belief that every person has a fundamental right to move through their city without fear. Drawing on a wealth of experience in Bay Area transportation policy, Sam previously championed safe streets and public transit as a Legislative Aide for local elected officials on both sides of the Bay.

Sam co-founded Berkeley safe streets organization Telegraph for People and continues to serve on the Coordinating Committee for Walk Bike Berkeley. Sam enjoys reading books about urban history, camping by bike, and exploring new neighborhoods one local food spot at a time.

Contact Sam at Sam@walksf.org

Guy Joaquin, Development & Events Manager
pronouns: he/him

Guy manages Walk San Francisco’s membership and donors, as well as walking events. Prior to joining Walk San Francisco, Guy served as a project manager for a career transition and relocation assistance company.

Guy feels most at home when outside walking. He began his walking “career” 10 years ago by completing the 500-mile Camino de Santiago pilgrimage across northern Spain, but nowadays you’ll most likely find him on a local route accessible by public transportation. In fact, Guy is the author of BARTable Walks, a series of BART station-to-station walking tours that highlight fun and interesting spots along the way.

Contact Guy at guy@walksf.org or call at 415.431.9255.

Marta Lindsey, Communications Director
pronouns: she/her

Marta oversees Walk San Francisco’s communications, plus is deeply involved in the organization’s policy and advocacy work. Marta also manages the San Francisco Bay Area chapter of Families for Safe Streets. Prior to joining Walk SF, Marta served as the communications director at TransForm, as well as the interim communications director at the San Francisco Bicycle Coalition. As a communications consultant, Marta worked with a range of nonprofits focused on transportation, land use, social justice, and sustainability.

Marta has lived in San Francisco for 20 years. She considers the fact that she and her family can walk almost everywhere they need to go a key piece of her happiness. She’s obsessed with Golden Gate Park and is proud to have been part of the campaign to make JFK Promenade permanent. Marta is the author of Discovering Golden Gate Park: A Local’s Guide and the children’s book Golden Gate Park, An A to Z Adventure.

Contact Marta at marta@walksf.org or call at 415.234.0347.

Jodie Medeiros, Executive Director
pronouns: she/her

Jodie is responsible for leading Walk San Francisco’s strategic work. She has a long and successful history leading communications, fundraising, and advocacy at urban livability, active transportation, and poverty alleviation nonprofits.

Prior to joining Walk SF, Jodie was Deputy Director at the SF Housing Action Coalition, where her work was critical in passing Home SF, a policy to incentivize building more affordable and family-friendly housing in San Francisco. During her eight-year tenure as Development Director at the San Francisco Bicycle Coalition, she helped grow the organization from four to seventeen staff and collaborated on the Great Streets Project, which led to Sunday Streets and the now-thriving parklet program. Jodie earned a Bachelor of Arts in History from Clark University.

Contact Jodie at jodie@walksf.org.

Liz Spielman, Communications Manager
pronouns: she/her

Liz’s role is to amplify and engage more people in Walk SF’s mission, especially through social media, storytelling, and communicating to inspire action.

Liz has worked in communications and marketing for mission-driven organizations for many years, most recently in the reproductive health care space. Originally from Minnesota, Liz volunteered with the Minneapolis Bicycle Coalition and Open Streets Minneapolis, where she developed a deep passion for safer streets and inclusive infrastructure. Wherever she is, walking gives Liz a sense of joy and connection to her community. 

Off the clock, you can find Liz swimming laps at the Y, exploring the Bay on foot (or on two wheels), cheering loudly for women’s sports teams, or searching for the perfect soft serve ice cream.

Contact Liz at liz@walksf.org

Board of Directors

Learn more about Board service.