About

Julia Souder

Chief Executive Officer

Julia is a strategic executive with over 20 years of expertise in the energy and environmental sectors as a coalition builder and advocate. She has been a longtime champion of clean energy technology, working extensively to support environmentally friendly technologies and equitable policies.

Julia leads the Council’s strategy and vision to enable the advancement of long duration energy storage to the center stage of the energy transition worldwide. Most recently, Julia served as the Executive Director of the Long Duration Energy Storage Association of California (LDESAC). While there, she led the education and outreach of emerging and existing long duration energy storage developers, focusing on its importance to grid reliability and meeting climate goals.

Julia launched JAS Energies in 2019 to bring inclusive, diverse, and equitable transitions and policies into fruition. She provided a deep understanding of challenges facing the US electricity sector in reducing carbon emissions, building renewable energy projects, creating markets, and implementing a clean energy vision. Previously, Julia was a Director at the The Natural Resources Defense Council (NRDC), focused on market and energy policy creation and implementation, creating coalitions and interpreted real-time grid operations and transmission planning.

Julia’s prior roles include senior positions at Clean Line Energy Partners, North American Electric Reliability Corporation (NERC), and the U.S. Department of Energy (DOE).

Julia holds two BAs from Oregon State University in Political Science and International Relations, and an MPA in Policy Implementation from The University of Southern California. She currently lives in San Francisco with her two children.

Larissa Fair

Chief of Staff & VP Communications

Larissa is a seasoned communications and marketing strategist with nearly 20 years of experience in corporate communications and public relations. She has worked with technology companies, NGOs, and consulting agencies to launch integrated marketing campaigns and programs. She is a respected leader with a robust range of marketing expertise, diverse industry experience, and proven success in startup and rapid growth environments

At the LDES Council, Larissa is focused on communications and outreach strategies to support The Council’s overall message and mission. Prior to joining the Council, Larissa led marketing efforts at the U.S. Energy Storage Association (ESA) and held senior positions at Citizens for Responsible Energy Solutions (CRES) and a number of technology companies. In those roles, she was responsible for leading public relations, social media, events, and corporate branding and messaging efforts. Throughout her career, she has generated awareness and messaging for company brands and established activities to engage varied stakeholder groups into action. Larissa began her career working for government IT consulting and public relations firms.

Larissa earned her degree from Radford University in Communications and Public Relations with a minor in Political Science. She served as President of the Washington, D.C. chapter of Social Media Club (SMC-DC) from 2007-2011 where she led a team of over 20 volunteers to educate businesses, nonprofits, and government leaders in best practices for social media. She currently lives in Maryland with her husband and two children.

Sumin Sohn

Director of Programs

Sumin is passionate about the intersection between business and sustainability, and is committed to finding innovative solutions that are both economically and environmentally beneficial. She has a track record of leading cross-functional teams and developing partnerships with international partners. Sumin enjoys collaborating with groups with diverse expertise, interests and perspectives.

As Programs Manager at the LDES Council, Sumin executes on the operational elements of the Council’s offerings and events, including facilitating the Working Group meetings. Prior to joining the Council, she worked in diverse roles that spanned the corporate and social sectors. At the Energy Coalition and EcoMotion, she managed projects to enhance energy efficiency and advance sustainability at public agencies across California, particularly at K-12 schools. Sumin also worked at Walt Disney Imagineering, the R&D arm of the company. There, she designed and implemented social entrepreneurship research projects in developing countries.

Sumin holds a BA in Political Science from the University of Pennsylvania, and a joint MBA and MPP from Harvard University. She has also earned certificates in Project Management and GLobal Sustainability from UCLA. She lived in Seoul, Hong, Kong, Sydney, Sao Paulo, Philadelphia and Boston, before settling in the Los Angeles area.