4-H Youth Development Program
4-H Youth Development Program
4-H Youth Development Program
University of California
4-H Youth Development Program

State 4-H Office

View Youth, Families and Communities Statewide Program Organizational Chart

View individual profiles at http://ucanr.edu/sites/anrstaff/Staff_Directory/


UC ANR building

The California State 4-H Office provides statewide leadership and direction to the 4-H Youth Development Program in programmatic, research, evaluation and administrative areas.

California State 4-H Office
University of California, Agriculture & Natural Resources
2801 Second Street
Davis, CA 95618-7774
Phone: (530) 750-1334
Fax: (530) 756-1148


Shannon Horrillo

Shannon Horrillo
Statewide 4-H Director
The Statewide 4-H Director provides visionary leadership to the implementation and evaluation of the University of California 4-H YDP and is responsible for creating and implementing strategies and programs to support the growth and development of the 4-H YDP, volunteers and staff. The Director connects research and extension efforts to the latest research on positive youth development and collaborates with UC ANR Strategic Initiatives, Program Teams, Workgroups, campus specialists, advisors, staff and county Cooperative Extension offices in fostering research and program delivery across the state of California. The Director provides leadership and oversight to the 4-H Advisory Committees, 4-H mission mandates (4-H Science, Technology, Engineering & Mathematics, 4-H Healthy Living, and 4-H Citizenship) and 4-H Military Partnership Program. The Director develops and coordinates revenue generating opportunities in support of the 4-H YDP, and develops, interprets, and implements UC policies related to the 4-H YDP. Primary clientele are 4-H staff, academics, county directors, and 4-H adult volunteers who, in turn, deliver programs to meet the needs of young people and families in the community. 

E-mail: sjhorrillo@ucanr.edu || Phone: 530-750-1334

Kali Trzesniewski
Kali Trzesniewski
Associate Director of Research - 4-H Youth Development 
Kali is an associate Cooperative Extension specialist in the Department of Human Ecology, specializes in developmental psychology. She also serves as associate director of research for the Statewide 4-H Youth Development Program. Kali completed her Ph.D. in psychology at UC Davis. She was a faculty member at the University of Western Ontario, Canada, prior to joining the UC Davis faculty in 2010. Her research interest include families, children and youth, students and education, positive youth development, health and well-being

E-mail: ktrz@ucdavis.edu

4-H Grows Here logo
Trisha Dinh
Youth, Families, & Communities Financial Manager
Trisha joins us from the UC Davis Department of Public Health Sciences and brings with her a wealth of knowledge and expertise in the areas of contracts and grants, project and program management, and personnel and financial management. She is passionate about the mission of YFC, our programs and the people we serve.

E-mail: tndinh@ucanr.edu || Phone: 530-750-1385


4-H Grows Here logo

Bernadette Ramirez
State 4-H Office Program Assistant
Responsible for providing support and customer service to all counties statewide. Job responsibilities also include administrative and program support for the State 4-H Office. 

E-mail: ca4h@ucanr.edu || Phone: 530-750-1334


Whitney Bell

Whitney Bell
4-H Analyst
Whitney provides statewide support to 4-H county and state staff as well as ANR colleagues through research, analysis and development of all 4-H policies. Additionally, she provides oversight to statewide 4-H financial reporting and management systems and the 4-H enrollment system and all associated reporting requirements. As a 4-H alumni, Whitney’s enthusiasm for the 4-H program began to grow many years ago and she believes strongly in the mission and positive impact of UC ANR and 4-H on our CA communities.

E-mail: webell@ucanr.edu || Phone: 530-750-1334

Larissa Leavens

Larissa Leavens
4-H Data Systems Analyst

E-mail:  llleavens@ucanr.edu  || Phone: 530-750-1334

Tamekia Wilkins

Tamekia Wilkins
YFC Data Analyst
Supports evaluation and research of the 4-H Youth Development Program and Expanded Food and Nutrition Education Program. The Data Analyst provides program evaluation support including data compilation, analysis, and assistance in reporting findings for YFC statewide programs.

E-mail: twilkins@ucanr.edu || Phone: 530-750-1368

Suzanne Morikawa

Suzanne Morikawa
YFC Marketing and Communications Specialist
Suzanne develops and implements marketing and communications plans for the 4-H and EFNEP programs in the Youth, Families and Communities Statewide Program. She supports the social media, website, communications, print and digital marketing materials for both programs. Suzanne is the Field Marketing Liaison with the National 4-H Council, to coordinate branding and marketing efforts for national campaigns.

E-mail: morikawa@ucanr.edu || Phone: 530-750-1381


Jessica Bautista

Jessica Bautista
Academic Coordinator for Science, Technology, Engineering, and Mathematics (STEM)
Jessica leads California's STEM Initiative to develop, strengthen, and evaluate programmatic opportunities for California's young people. Jessica focuses on adapting and designing culturally responsive best and innovative practices, programs, activities and curriculum to reach underrepresented youth of color, particularly Latino youth

E-mail: jbautista@ucanr.edu || Phone: 530-750-1341


Anne Iaccoppucci

Anne Iaccopucci
Academic Coordinator for Healthy Living
Anne coordinates healthy living program planning and curriculum development. She also provides academic leadership to citizenship and leadership programming, events and activities. Anne's M.A. in Child Development and experience in health related programming, curricula development and working with youth teams make her a great asset to 4-H and the Healthy Living Leadership Team.

E-mail: amiaccopucci@ucdavis.edu || Phone: 530-750-1339


Gemma Miner

Gemma Miner
Academic Coordinator for Volunteer Management
Gemma leads efforts to ensure principles and best practices for volunteer management are implemented in the 4-H YDP. She builds the capacity of academics and staff with oversight of the 4-H YDP to engage, educate, and support volunteer efforts and create and manage volunteer-based programs. Gemma has extensive experience in developing youth development trainings for staff, volunteers and youth. She has been in the field for 28 years.

E-mail: gmminer@ucanr.edu || Phone: 530-750-1334


Kendra Lewis

Kendra Lewis
Academic Coordinator for Evaluation
Kendra has a PhD in Human Development and Family Studies.  She uses her research in positive youth development, as well as her skills in data management and statistical analyses for evaluation of the statewide 4-H Youth Development Program. 

E-mail: kmlewis@ucanr.edu || Phone: 530-750-1337


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Community Education Specialist 2 for Animal Science Education 

Responsible for animal science education and curriculum development in the State 4-H Program. Lead coordinator for State Field Day, State Presentation Day, Equine Field Day, State Horse Classic, and the Livestock Quiz Bowl. Coordinates state 4-H teams that travel to national competitions. Leads the Animal Science Education Advisory Committee and participates on the State Fair Rules Advisory Committee and Agricultural Advisory Council.

E-mail: Please contact Jessica Bautista, jbautista@ucanr.edu  || Phone: 


Jeanne Christenson

Jeanne Christenson
Military Program Representative
As part of the Operation Military Kids (OMK) program, Jeanne manages and facilitates babysitting trainings for military youth across the state. For Jeanne, being able to help youth members learn a new life skill while having fun at the same time is personally rewarding.

E-mail: jpchristenson@ucanr.edu || Phone: 530-723-4801


Jenna Colburn

Jenna Colburn
Program Representative for Civic Engagement & Leadership
Jenna leads and manages statewide youth leadership, civic engagement, and service learning programs for 4-H. She plans, develops, and provides training to 4-H Youth Development staff, volunteers, and youth in each of these areas. In addition to planning and managing various conferences and leadership events, Jenna leads the Civic Engagement/Service-Learning Advisory Committee. Jenna has been involved in 4-H for over 16 years (3rd generation 4-H) and her parents are still members!

E-mail: jcolburn@ucanr.edu || Phone: 530-750-1336

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Scott Mautte
Program Representative for Volunteer Development
Scott develops and designs volunteer development trainings, curricula, and other educational materials; develops resources to support volunteers; and provides professional development opportunities for staff and academics on adult learning theory and training volunteers. Scott has worked with young people for over 20 years. He is a committed ally and agent of youth development.

E-mail: scmautte@ucanr.edu || Phone: 530-750-1335

University of California Specialists

Martin Smith

Martin Smith
Associate Cooperative Extension Specialist
Martin is an associate Cooperative Extension specialist with a split appointment in the Department of Human Ecology and in the UC Davis School of Veterinary Medicine, specializes in youth scientific literacy and science education outreach. Martin has been on campus since 1996; he accepted a shared appointment with human ecology in 2012. He has an M.S. in biology and an Ed.D. in teacher leadership. Martin conducts needs assessments for California 4-H in the STEM (Science, Technology, Engineering and Mathematics) project area, including for science curriculum development for youth, effective curriculum implementation and dissemination strategies, and effective professional development methods for science educators.

E-mail: mhsmith@ucdavis.edu

California 4-H Foundation


4-H Foundation logo


California 4-H Foundation
The California 4-H Foundation functions as a collaborating support group to ANR in order to raise funds on behalf of statewide and local priorities of the 4-H Youth Development Program needs.

Mary Ciricillo

Mary Ciricillo
The Director of the California 4-H Foundation provides leadership to priorities within the California 4-H Foundation and also serves as the Associate Director of Development for the statewide 4-H Youth Development Program. 

E-mail: mciricillo@ucanr.edu || Phone: 530.750.1302



Tammie Erhard
Development Operations Manager
Tammie is responsible for supporting the financial and administrative operations of the California 4-H Foundation. This includes processing all gifts made to the California 4-H Foundation, transferring donor designated funds to 4-H programs and managing the donor database.

E-mail: tlerhard@ucanr.edu || Phone: 530-750-1389


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