photo: steve hutchcraft


Linus Eukel

(925) 228-1130
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Linus has significant experience in the public and nonprofit sectors, including with John Muir Land Trust, where he works closely with the Board of Directors and staff to manage change and growth, strategic planning, individual contributed income development, board and donor cultivation, land acquisition, land use planning, stewardship and public education activities. He oversees assets of $15 million, providing vision and leadership to ensure that JMLT achieves its ongoing mission, implements balanced annual operating budgets and meets its ambitious organizational goals for fundraising, financial stability, public visibility, diverse stakeholder partnering and long-range planning. Mr. Eukel is a native of Walnut Creek, California and currently resides with his wife Stephanie and their daughter Olivia in the City of Orinda. He serves on the Board of Directors of the California Council of Land Trusts, Board of Directors of the East Bay Leadership Council, Advisory Council of the Bay Area Open Space Council, and Board of Directors of the Warren W. Eukel Teacher Trust. Linus was educated in the Walnut Creek public school system, is a graduate of U.C. Berkeley, and holds a Master's Degree from the University of New York.
Karen Booth
Individual Giving Manager

(925) 228-5018
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Karen joins JMLT as a 15-year resident of Walnut Creek and honorary Californian. She grew up among the bayous of south Louisiana, and spent many years in San Francisco and Washington, D.C. Despite loving city life, she has grown to adore the rolling hills and ridges of Contra Costa County, which she explores with friends, her two teenage sons and their German Shepherd Axel. Karen brings years of experience as a journalist, political professional and fundraiser. Karen oversees JMLT’s high-impact donor program -- providing leadership, guiding strategy, and cultivating relationships with individuals who support our ambitious campaigns of land acquisition, conservation and stewardship. She holds a degree in Journalism from the University of Louisiana-Lafayette. When not hiking and working, Karen can be found voraciously consuming all things sci-fi, watching too much TV, tweeting, podcasting about pop culture and scaling indoor rock walls around the Bay Area.
Frances Browne
Database Analyst

(925) 588-5980
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Frances joins JMLT after retiring from Wells Fargo Digital Services in 2015. She brings four decades of corporate and government experience, and is preparing us for the next generation of data management. Frances has lived in Contra Costa County since 1980 after moving from Los Angeles, and currently resides with her husband Tim and their cat Leo in Walnut Creek. Even as a Los Angeles-area native, Frances enjoyed the outdoors --- camping in Yosemite, riding horses, and exploring the hillsides of Southern California. When not working, you can find Frances traveling with her husband, writing short stories, at the movies, or browsing a used book store in the East Bay.
Jay Dean
Marketing Director

(925) 374-4000
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Jay spends his time getting the message out about John Muir Land Trust’s work to protect land in Contra Costa County for everyone to enjoy today and for generations to come. Jay spent ten years as Chief Marketing Officer of The Trust for Public Land, one of the country’s largest conservation organizations. He serves on the board of High Country News, and served on the Executive Committee and as Marketing Chair of EarthShare, a nonprofit group that manages workplace giving for over 500 environmental groups. Jay is a seasoned marketing veteran with three-and-a-half decades of experience as Chief Marketing Officer and senior brand strategist at blue-chip organizations. Jay holds an MBA from the Haas School at UC Berkeley, and a BA summa cum laude from Harvard College. A twenty-five year resident of the East Bay, Jay currently lives in Lafayette with his wife, two daughters, two dogs, one cat, two bunnies, and seventeen chickens. He is usually covered in dog hair, sawdust, trail dust, or all three.
Glen Lewis
Open Space

(925) 228-7612
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Glen helps to oversee the operation, maintenance and preservation of more than 2,000 acres of open space owned by JMLT. In 2009 Mr. Lewis retired from a successful 25-year career as Fire Captain with the Moraga Orinda Fire Department. Prior to his work with the Fire Service, he was employed as a Park Ranger with the East Bay Regional Park District. Glen is a 50-year resident of Martinez, California where he currently lives with his wife Martha, their daughter Kate and son Graham. He was educated in the Martinez Public School System, holds a Bachelor of Arts Degree in Biological Sciences from California State University at Sacramento and is certified in a wide-range of specialized technical training relevant to his job responsibilities. In his spare time, Glen enjoys being active with a variety of hobbies and interests including carpentry, gardening, hiking, bicycling and kayaking.
Carolina do Val Callao

(925) 228-8232
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Carolina provides essential administrative management to the JMLT team, including database analytics, events coordination, social media, and critical care of our habitat (our office). She brings more than seven years of rich professional experience to her position, having worked in event planning, operations, customer relations and program management support for both the nonprofit sector and hospitality industry. Born and raised in São Paulo, Brazil, Carolina spent her childhood summers exploring the Amazon at her family’s cattle ranch where she enjoyed horseback riding, swimming in rivers and tending the family vegetable gardens. Carolina currently resides in Walnut Creek with her husband Cesar, their son Bruno and daughter Luiza. When outside the office at her free time, she enjoys hiking with her family as well as exploring our beautiful Bay Area region.
Krista Vossekuil
Development and Communications Manager

(925) 228-5040
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Krista is grateful for the opportunity to contribute to JMLT’s mission of protecting and caring for open space, ranches, farms, parkland and shoreline in Contra Costa County, where she was born, raised and currently resides. Her diverse career working for Bay Area nonprofits spans over a decade and includes donor relations, marketing and communications, public affairs and business development. As Development and Communications Manager, Krista oversees corporate giving and volunteer programs through JMLT’s Corporate Council, employee and workplace giving, and supports marketing and communications, and individual giving efforts. Born at John Muir Hospital in Walnut Creek, she feels a special connection to the people, history and landscape of Contra Costa County. Krista graduated from the University of California, Davis with Bachelor Degrees in English and Political Science, and a minor in Women and Gender Studies. She lives in Martinez and, in her spare time, enjoys birding, hiking, and spending quality time with friends.