
About Us

Bringing the love and the help of Christ to marginalized neighborhoods through after-school tutoring and mentoring for kids.
Leaven Kids exists to break the cycle of poverty and violence by fighting for change where it matters most, with children.
We plant learning centers directly in high-risk neighborhoods, bringing opportunity and hope right to a child’s doorstep.
At no cost to families, kids in grades K–5 gain daily access to tutoring, mentoring, and encouragement from caring adults who show up with consistency and heart. With this support, children build the skills, confidence, and vision to thrive, not just in school, but in life. And as kids rise, neighborhoods become safer, stronger, and full of possibility.
Our Programs
Learning Centers
California
Calms
91 Riverview
Ter Benicia, CA 94510
Groves Apartments
855 E Tabor Ave
Fairfield, CA 94533
Village Apartments
506 Civic Center Blvd Suisun, CA 94585
Carolina Heights
135 Carolina St
Vallejo, CA 94590
Summit Place
1130 W 4th St
Ontario, CA 91762
Eden Housing
1121 & 1140 Virginia Ln Concord, CA 94520
Phoenix Drive
1350 Phoenix Dr
Fairfield, CA 94533
Alamo Gardens
1501 Alamo Dr
Vacaville, CA 95687
Longshore Cove
201 Maine St
Vallejo, CA 94590
Dana Drive
1180 Dana Dr
Fairfield, CA 94533
Signature
1189 Tabor Ave
Fairfield, CA 94533
East Monte Vista
1020 E Monte Vista Ave Vacaville, CA, 95688
Sereno Village
750 Sereno Dr
Vallejo, CA 94589
Grande Circle
1970 Grande Cir
Fairfield, CA 94533
Stoddard West
345 Gasser Dr
Napa, CA 94559
Mariposa Neighborhood
1625 Alamo Dr
Vacaville, CA 95687
Norman King
545 Magazine St
Vallejo, CA 94590
TEXAS
Riverside
515 Riverside Dr
San Antonio, TX 78223
Westway
5627 Culebra Rd
San Antonio, TX 78228
Leaven Kids Leadership

Mark Lillis
Chief Executive Officer
Mark Lillis has dedicated his career to helping children reach their full potential. His journey began in Santa Barbara, where he founded a summer camp program at Las Positas Park and later served in local government, leading youth and community initiatives. Driven by a deep commitment to children and families, Mark went on to help establish Leaven Kids, where he now serves as Chief Executive Officer. Through after-school tutoring centers, the Summer Success program, and volunteer-driven initiatives, he and his team create safe, supportive spaces where kids can thrive. With the partnership of a dedicated board, staff, and volunteers, Mark continues to expand Leaven Kids’ reach, transforming neighborhoods one child at a time. Mark holds a bachelor’s degree from Westmont College and a master’s degree from Azusa Pacific University. He and his wife, Melinda, live in California with their son, Hudson. Outside of work, Mark enjoys running, reading, traveling, drinking coffee, and spending time with friends and family.

Renee Tadlock
Chief Operating Officer
Renee Tadlock has a passion for community outreach that shines brightly as the Chief Operating Officer for Leaven Kids, purposefully leading and training a team of individuals working toward the common goal of instilling hope into the lives of our youth. She is dedicated to the mission of Leaven Kids to empower these communities by providing influential mentors who will invest in the academic, moral, and spiritual foundations of children and their families. Renee Tadlock, is part of an entire family that shares her commitment to engage the whole community in coming together to resource underserved neighborhoods.

Ida Somero
Chief Development Officer
Ida Somero holds a bachelor’s degree in Business Administration and Management from Loyola Marymount University, where she attended on a full-ride athletic scholarship for Women’s Basketball. She was a leader in retail management at Target for over 15 years before entering the non-profit aren, where she gained firsthand knowledge of how an integrated approach can maximize donor engagement. As Chief Development Officer, Ida brings over 18 years of development experience to the team. Having a deep personal commitment to advancing the lives of underserved children, Ida has shaped the fundraising initiatives of Leaven Kids. Additionally, she brings a breadth of event-driven fundraising experience to the table as an independent contractor, where she has managed and produced many successful events. A CFRE, she is also a member of Associate Fundraising Professionals.

Marina Kovalev
Chief Financial Officer
Marina Kovalev, a California-licensed CPA with a bachelor’s degree in Business Administration, has been working with Leaven Kids as the Controller and CFO since 2012. Prior to coming to Leaven Kids, she focused on auditing nonprofits and property management companies. Marina prides herself in keeping clean financial records and using the latest accounting technology to keep moving Leaven Kids forward. Being an immigrant herself and utilizing many resources to get ahead in elementary school, she understands the huge value Leaven Kids plays in the lives of the children and parents who might not be able to assist their kids with their schoolwork.
Board of Directors

Chief Joe Allio
President
Police Chief, City of Fairfield (ret)
Chief Joe Allio is a 34-year veteran of law enforcement. He has also served in pastoral positions at local churches, was a member of the Host Lions Club and the President of the Northern California Batten Disease Association. As a member of the Fairfield Police Department, he served on the SWAT team, was a founding member of the Peer Support Team, participated in the development of “active shooter” response training and developed and implemented the Police Probation Team. He has earned two Exceptional Performance Citations and completed Senior Management Law Enforcement Institute hosted by Boston University.
Honorary Board Members

Hon. Mike Nail
Emeritus
Superior Court Judge (ret)
Judge Mike Nail is a retired Judge of the Superior Court for the State of California, holding that position for more than two decades. Prior to assuming the bench, he was District Attorney for Solano County for 11 years and Assistant District Attorney for 14 years. Upon his retirement in 2007, Judge Mike Nail wanted to invest his time into helping at-risk children. He was a former member of the Lion's Club and a member and past president of Fairfield-Suisun Chamber of Commerce. He and his wife have three children and five grandchildren.