Trinity Center | Walnut Creek

Trinity Center Team

Leslie Gleason, Executive Director

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Leslie brings 30 years of leadership experience in which she has demonstrated a record of success delivering consistent homeless service programs, building community collaboration, and developing strong teams in community-based organizations and government agencies in Massachusetts and California including SHELTER, Inc., and prior to that was Director of Housing Programs with the Housing Authority of the City of Alameda and the Massachusetts State Department of Housing and Community Development Leslie graduated from Yale University, holds a Master of Divinity from Episcopal Divinity School and completed graduate-level coursework in public policy at the University of Massachusetts/Boston. She enjoys traveling, movies, and college women’s basketball. Leslie is grateful to be part of this community that is committed to helping people “meet their basic needs and reach for their dreams.”

Pamela Arend McGrath, Associate Executive Director
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Pam originally joined Trinity  Center as the coordinator for the Evening Program. She has played a few different roles over the years, and today, she is responsible for fund development. Pam is a mid-westerner who left the family farm to study and travel abroad and all over the U.S. before landing in the Bay Area. She has appreciated experiencing many flavors of life. She is proudly passionate about advocating for vulnerable people and helping create pathways for equity and dignity. Pam has done this through her work in corporate and non-profit finance and management. Whether working on growth opportunities, cultivating support, collaborating on processes or policies, or participating in boots on the ground advocacy, she is bolstered by her firm belief that every person is worthy of support and capable of taking their own next step toward success. She wants everyone to join in these efforts and support Trinity Center’s mission!

Moji Shobeiri, Business and Operations Manager
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Moji started volunteering at the Trinity Center as a fund development team member in mid 2017 and joined the Trinity Center Team as the Business and Operations Manager in August 2021.

He has earned his Master’s degree in Business Administration (MBA) from California Lutheran University in Thousand Oaks, CA., and has owned and operated small businesses since 1984.
Moji also holds a California Real Estate Broker’s License and has a proven record in assisting families in making the right move since 1989.
His passion for social justice and his service-oriented nature is harmonious with the mission and vision of the Trinity Center. Please contact him with your suggestions and new ideas to help him in serving at the highest level of standard and to exceed community expectations.

Leticia Wiesner, Director of Programs and Member Services
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Leticia Wiesner is a passionate leader and advocate for working with marginalized people, and developing social enterprises with an emphasis on Diversity Equity and Inclusion. She is a Business and Workforce Development professional who attended Santa Clara University in Engineering, changing paths to become a Counselor in Mental Health through studies at San Jose State University. She is also a leader in Supported Employment with 20+ years’ experience as a Director/Manager/Counselor in non-profit/public/county/social enterprise/education, and corporate sectors. In her role at Trinity Center, she oversees case management and member programs. Leticia is also a consultant for diversity, equity, and inclusion for Workforce Consultants Group, and a Board Member for Marin Ventures in Marin County. She loves serving and promoting strong and progressive work environments for all seeking fair and dignified treatment.

Scott Garvey, Member Advocate & Substance Use Disorder Counselor
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Scott became a part of the Trinity Center team in November of 2016 when he was hired part-time for the evening program winter shelter. He then accepted a full time position with Trinity as a Member Advocate in February of 2017.

Scott has a degree in both Addiction Counseling and Sociology. Since his employment at Trinity Center, he has attained his license in Substance Use Disorder Treatment in the state of California.

Scott has tremendous compassion and believes everyone deserves to be treated with respect. He is an advocate for giving second chances, and is eager to assist with the Trinity Center mission of being a doorway to opportunity for all those in need. Please feel welcome to introduce yourself to Scott the next time you visit the Trinity Center!

Patty Purvis-Thielman

Patty Purvis-Thielman, Front Desk/Registrar
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Patty joined Trinity Center in April 2019. Recently retired after 15 years with the Acalanes Union HSD, she was their Technology Help Desk and Webmaster.  Working for over 40 years in technology support, she has fine-tuned customer support skills.   Since her retirement from the school district she has worked as a receptionist for a local car dealership.  She strongly believes in the inherent worth and dignity of every person and is excited to find a new “work home” here at Trinity Center.

John Waichira, Member Advocate & Housing Counselor
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John joined the Trinity Center team as a Member Advocate in 2020. He has previously worked in capacity building programs for vulnerable communities with both non-profit and housing coops.

He is passionate about a profession in which he can help others.  He believes that everyone has the potential and capability to change and improve their situation with the appropriate support, information and resources.

He is keen and committed to contributing to Trinity Center’s efforts to build a community that promotes safety, friendship, warmth, respect and caring for each other. John has a Bachelor of Arts Degree in Human Development Studies and an Associate in Social Work.

He is grateful to be part of this community and is eager to help people find opportunities that will assist them to move to the next level in their lives. He is enthusiastic to see members realize their dreams.

Please feel welcome to stop by and say hi to John, the next time you are at Trinity Center!

Aida Gamez, Member Advocate
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Aida was born and raised in San Francisco, California. She was a young teen mother who was also in the foster system. As she struggled to find help with services and tried to connect with a social worker who could help her become self-sufficient, Aida’s experience was that there weren’t very many of them who were willing to meet her needs. While feeling fearful of what could happen to her, a passion for helping others in similar situations grew inside her.  It is important to her to help those looking for services and to be present as someone who understands the experiences of needing help.
Aida has 10+ years experience as a case manager, working with youth and adults. She is very passionate and determined to help those who need support.  She wants them to believe that they can and will overcome their current situations and find success. 


Roosevelt Glover, Operations and Program Associate
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Roosevelt was born and raised in the Bay Area. He first joined Trinity Center November 2018 and helped support our winter program. Then a Patient Relationship Specialist for the Huntsman Cancer Institute in Salt Lake City, Utah. Prior, Roosevelt worked for Wells Fargo Bank for 13 years in Concord, Ca as a Superior in their Online Executive Office, and a Technical Support Team Leader. Roosevelt is passionate about people and loves to build long lasting meaningful, and memorable relationships. “It’s people who contribute to my happiness, and I enjoy helping others. I love interacting with Trinity Center Members and I’m very happy to be here.”


(925) 949-8712
Mailing Address:
P.O. Box 126, Walnut Creek, CA 94597

1888 Trinity Avenue
Walnut Creek, CA 94596