Peter Olson
CEO/Executive Director

Peter Olson previously served as the Director of Little House, The Roslyn G. Morris Activity Center, since 2010. He has over 25 years of experience working in the not-for-profit sector, specifically older adults, individuals with special needs, and children. Peter’s professional experience includes the Director, Public Affairs and Communications for Easter Seals Bay Area and the Health and Wellness Director at the Easter Seals Timpany Center in San Jose. He holds a Bachelor’s degree in Anthropology from San Jose State.

Marilyn Baker-Venturini 
Director of Nutrition Service

Marilyn Baker-Venturini has served as the Director of Meals on Wheels, since 2010.  Marilyn has over 30 years of experience working with senior service organizations and home health and hospice agencies in San Mateo, San Francisco and Santa Clara counties.  While working on her master’s degree, she completed research on the relationship between nutrition and falls; her research, “Nutrition Status as a Risk Factor for Falls Among Older Adults”,  was published in The International Journal of Aging in Society. Marilyn is currently a member of San Mateo County’s New Beginnings Coalition (NBC) and NBC Steering Committee.  The NBC is a broad-based group of older adults, people with disabilities, caregivers, and service providers that coordinates the development of the countywide strategic plan for services for older adults and adults with disabilities.  The Steering Committee develops and manages the area plan to accomplish the goals and objectives of the area plan.  In addition, she is a member of the San Mateo County Fall Prevention and the California Senior Nutrition Network.  She holds dual Bachelor’s degree in Psychology and Women’s Studies from Sonoma State University, and a Master’s degree in Nutrition with study emphasis in Geriatric Nutrition, and a Certificate in Social Gerontology from San Jose State University.

Joe Christian
Director of Finance and Administration

Joe Christian has managed PVI’s accounting and finance activities as Controller since 2004.  He is responsible for insuring PVI’s financial compliance with government and private contacts. Earlier in his career, Joe worked in the business and financial departments of hospitals and other healthcare providers for over 15 years.  He understands the particular challenges faced by small organizations, having grown up around a family business.  “A problem well stated is half solved” was that business’ mantra, an approach he continues to use at PVI.  Joe also directs the Facilities department and is the first contact for most technology issues.  He holds a Bachelor’s degree in Economics from UC Davis and an MBA from Temple University.

Barbara Kalt
Director Rosener House

Barbara Kalt joined Peninsula Volunteers, Inc. in 1981. She has been in the field of adult day services for over 30 years and Director of Rosener House for 20 years. She has been instrumental in the process of planning and building a new facility and expanding services for older adults with cognitive and physical disabilities in the community.  Barbara’s responsibilities include supervising a staff of 20 at Rosener House which provides therapeutic activities and support services for over 100 program participants, grant writing for Peninsula Volunteers Inc. programs, marketing, planning and budgeting.

Barbara has served on the Board of Directors of the California Association of Adult Day Services, is currently on the Executive Committee of the San Mateo County Paratransit Coordinating Council, advocating for transportation for older adults and individuals with disabilities.  She has been co-chair of the San Mateo Co. Aging and Adult Services New Beginning Coalition and worked on various committees of Aging and Adult Services.  She attended the University of Wisconsin and received a Bachelor’s degree in Behavioral Sciences from NotreDame de Namur University.

Rebecca Matteson Nelson
Director of Development

Rebecca Nelson joined Peninsula Volunteers, Inc., in June, 2018. Her professional experience spans over 30 years in executive positions within the local banking and investment services industry along with deep community engagement in medical sector non-profit leadership roles. Rebecca is inspired by the opportunity to contribute to and impact the vitality and well-being of our adult and senior populations through the program offerings of Peninsula Volunteers, Inc., over the last 70 years. It is exceptionally meaningful to her to join the organization where her sister served as a PV for many years. Rebecca is a member of the Northern California Planned Giving Association, the Association of Fundraising Professionals and several non-profit philanthropy councils, estate planning councils and professional community associations in the Bay Area. Rebecca holds a Bachelor’s degree in Sociology from the University of California Los Angeles and completed executive programs at the Stanford Graduate School of Business in finance and strategic marketing. She is also a Certified Wealth Strategist®.


Stay Up To Date

Sign up to receive our email newsletter here. We send out regular updates on upcoming events, programs, and new initiatives.

Sign Up


Give your time to support our programs, and get to know some of the incredible seniors who built our community.

Learn More


Make a donation to support the work of PVI. Every dollar donated ensures that seniors are cared for and engaged in meaningful ways.

Give Here
Website Management by Visualize Digital