Our Board

The IMPACT Bay Area Board of Directors is responsible for our fiscal health and programmatic quality. We are always looking for qualified individuals to join IMPACT Bay Area's Board of Directors. Please visit the Join our Board page to learn more. Then email a short statement of interest and/or your resume to jessica@impactbayarea.org.  


Jessica Pocalyko, Board Chair

Jessica Pocalyko is a Senior Learning & Organization Development Consultant for Dignity Health, a California-based non-profit healthcare organization. She received her Master of Science in Organization Development (MSOD) from Pepperdine University’s Graziadio School of Business and Management. Jessica has worked extensively with non-profit organizations in both Los Angeles and San Francisco. Jessica specializes in change management, group facilitation, cultural awareness, meeting and conference design, strategic planning, and leadership and team development. As an Impact Bay Area board member, Jessica hopes to support growth and expand community partnership while staying true to IMPACT's mission and values. 




John Tudor, Board Treasurer

John joined the board in September of 2017 after attending an introductory training session with his wife. He was impressed by importance of the mission, the quality of the instruction, and IMPACT’s commitment to the empowerment of women. John was born and raised in Cape Town, South Africa, where he graduated from the University of Cape Town with a degree in finance. He left South Africa as a Rhodes Scholar to attend Oxford University where he received his MA. After working in Europe and Asia as a business strategy consultant for Monitor Company, John came to the US to attend Harvard Business School. Having graduated with his MBA, he worked for Bain Capital’s private equity fund in Boston. John left Bain Capital to join FFL, a private equity firm in San Francisco where he was until he retired. Since leaving his career in finance, John has been volunteering time at various non-profits in the Bay Area. John and his wife live in Marin with their two sons, and a Labrador.




Stephanie Somersille, Board Secretary

Stephanie joined the board in May, 2018 after taking the 24 hour Basics class the previous November. She is excited about IMPACT’s mission and committed to helping as many people as possible learn to keep themselves safe and secure.

Stephanie has expertise in mathematics, finance, teaching methodologies and game theory including strategic planning. Through her consulting work, she has experience bringing varied groups together to achieve common goals.

Stephanie holds a BA in Economics from Yale University and a PhD in mathematics from University of California, Berkeley. She does math research and consults in various areas including machine learning, data science, math education and mathematical finance.

In her free time Stephanie can be found surfing, volunteering at the ballet and symphony, taking ballet classes or helping care for the animals at The Marine Mammal Center.


Nav Gill, At-Large Board Member

Nav was so impressed by the IMPACT model and training when she took the 24 hr Basics class, that she joined the Board right away. 
The IMPACT vision of 'everyone deserves to be safe so they can live a fuller, more confident life' resonated deeply with her.
Inspired by her teacher Sensei Fukuda (the first woman to achieve 10th Dan) who broke the glass ceiling for women in martial arts, Nav had setup a grassroots organization in India to teach at-risk girls self-defense and judo. She now hopes to spread the IMPACT training model and take it to India.
She has a bachelors in Economics from Punjab University and MBA from University of Massachusetts/SF State. 
She has worked in Finance, Tech, AI, and is currently a Product and Tech strategy consultant. 
She is a PADI dive instructor, novice sailor, and volunteers all over the world to protect endangered species. 


Erica Chesley, At-Large Board Member

Erica is a Program Manager with the Oracle Education Foundation, a non-profit funded and staffed by Oracle. She holds a BA in Math and Classics from Carleton College in Minnesota and an MA in Learning, Design, and Technology from Stanford University’s Graduate School of Education. Prior to working at Oracle, Erica taught Math and computer science at the secondary school level and supported her colleagues in implementing technology in effective and meaningful ways. Born and raised in San Francisco, Erica took an IMPACT Basics class during her senior year of high school and the sense of empowerment, strength and camaraderie that she discovered there has stayed with her to this day. In joining the board, she hopes to help more people have access to that experience. In addition to her work with IMPACT, Erica volunteers with the Computer History Museum, the DSE Running Club, and the Oracle Women’s Leadership team. She enjoys travel, board games, young adult literature, and recently took up pottery! Erica joined the IMPACT Bay Area board in April 2019.



Monica Stone, At-Large Board Member

Monica joined the board in November 2016, motivated by her passion for empowering women and the LGBT population. She wants all people to be able to defend themselves verbally and/or physically. Monica and her two adult daughters have felt empowered by their IMPACT training and want to make the training available to everyone across the Bay Area.

Monica works as a marriage and family therapist with couples and individuals suffering from sexual difficulties as well as depression, PTSD, and anxiety. She mentors younger therapists and is active in her neighborhood organizing for carbon reduction and emergency preparedness. Monica loves bringing together her large extended family with her husband of 35 years as well as hiking, body surfing and reading about the world.



Sarah Tyack, At-Large Board Member 

Sarah took the 24-hour Women’s Basics class after she was attacked and beaten while on a run in San Francisco. She was so passionate about the work that IMPACT Bay Area does and how important this class was for her recovery, that she asked to join the board so she could help spread the word. She’s been on the board since 2019.

Sarah has a private practice as a registered nurse and board certified lactation consultant. She’s also worked for many years doing crisis intervention and has facilitated emotional support groups for new mothers. She has two grown children and two grandchildren.




Mary Walker, At-Large Board Member

Mary joined the IMPACT Board in February 2017 after being so impressed by the quality of the three-hour introduction class that she had to find out more about the organization behind it.Her background as both a leader in smaller technology companies and as a management consultant help her contribute at IMPACT.

Mary has worked as a Director, Vice President, and consultant to various technology companies, ranging in size from a few dozen to a few thousand employees. She has held roles in sales, customer service, business operations and human resources. She is currently associated with Exponential Talent, a boutique consulting firm that specializes in diversity and inclusion in organizations. She has a BA from Princeton University, a Masters in Anthropology from Cambridge University, and an MBA from UCLA. She lives in Redwood City with her husband Mark and enjoys photography.




Jonathan Wang, At-Large Board Member

Jonathan Wang became a suited instructor with Impact Los Angeles back in the mid-90s after his future wife, Heather - an Impact graduate and instructor herself - introduced him to the program. Jonathan joined the board of Impact Bay Area in 2019. He is currently the Chief Operating Officer at FACES SF which provides early childhood education and workforce development services to San Francisco families. Jonathan’s career also includes time as the Director of Finance and Administration at New Door Ventures, and many years in IT, Operations, and Human Resources at the San Francisco Chronicle. He earned his BA in Political Science from UC Irvine and an MBA from the University of Phoenix. Jonathan and Heather live in San Francisco and have two sons in college.