Developing quality housing for older adults takes focused and diligent efforts of a very dedicated team. Take a moment to read about some of the most talented people in the business of developing and managing quality affordable housing for older adults.

Mary StompeExecutive Director

Mary joined PEP Housing in October 2004 as the Executive Director. Prior to joining the organization, Mary worked in nonprofit administration, mostly for educational and social service organizations. She is a Certified Public Accountant (CPA) and started her career as an Auditor for a public accounting firm. She founded a non-profit organization, Rebuilding Together, located in Petaluma. Rebuilding Together is dedicated to providing home repairs at no cost to seniors and individuals with disabilities, allowing them to remain in their homes. Mary also served as a Petaluma City Councilmember. She has a Senior Professional in Human Resources (SPHR) certification and is a licensed real estate broker. She has a MBA in Business Administration and a BS degree in Management. Mary served on the Board of Directors for Leading Age, California as Vice President on both the Housing and Public Policy Cabinets. Mary has volunteered with Red Cross since 2003 and serves as a Disaster Action Team Supervisor. She is a Commissioner with Marin County Parks and Open Spaces. When Mary is not busy at PEP, she enjoys spending time with her husband, son, dogs, chickens, ducks, deer and goats.

Kathryn GrossExecutive Assistant – Joined PEP Housing in October 2016

Sharon Patchin, Director of Human Resources

Sharon joined PEP Housing in December 2017. Her experience in human resources spans 25+ years working in various industries. Sharon owned a consulting firm, supporting start-up and small companies. Sharon was a proud member of the Army Reserves from 1986-2001. She worked as a Unit Administrator for the Department of the Army, 1036th Reserve Forces School in Pennsylvania. She was a Staff Sergeant (E-6) upon her honorable discharge in 2002. Sharon graduated magna cum laude in 2011, earning her BA in Sociology/Human Resources. Her certifications include Senior Professional Human Resources, California (SPHR-CA), Society of Human Resource Management-Senior Certified Professional (SHRM-SCP) and the California Law HR Specialty credential. Sharon belongs to the Society for Human Resource Management (SHRM), Northern California HR Association (NCHRA), Northern Arizona HR Association (NAHRA) and Northern Nevada HR Association (NNHRA).


Our resourceful Resident Service Coordinators (RSCs) receive special training and certification from Ohio State University’s Department of Gerontology, maintain their professional standing in the American Association of Service Coordination (AASC), and stay current with frequent changes in the complicated service network. They make sure new residents are oriented to their communities by meeting with each resident and performing an intake of their needs. The RSC can guide the resident to resources such as discounts on utilities and nutritious food supplement programs. Additionally, they can learn about transportation alternatives, health coverage options, and local opportunities for recreation, entertainment and community involvement. As our residents age, health crises may occur and new needs arise, but PEP’s seniors know they can count on their Resident Service Coordinators for compassionate and timely help.

Marilyn Buono – Resident Services Manager – Joined PEP Housing in September 2018

Marilyn joined PEP Housing in September 2018 as a Resident Services Coordinator (RSC), empowering residents with information and referrals, navigating access to resources, and actively supporting residents to live independently in their homes while thriving in their communities. Marilyn was promoted to Resident Services Manager in 2020, overseeing an ever-growing staff and the many department programs they bring to our seniors. Prior to joining PEP, she worked for Petaluma People Services as a Senior Case Worker. She comes to PEP with extensive case management experience. Marilyn has her BS degree in Social Work, focusing in areas related to mental health, developmental disabilities and seniors living on limited incomes. Marilyn is an active member in her community in Ukiah, working as a Senior Peer Counselor and Hospice Volunteer, and serving on the Board of West Company. Additionally, Marilyn provides services for Ukiah residents.

Erin Hoffman – Sr. Resident Services Coordinator – Joined PEP Housing in February 2003

Matthew DistefanoResident Services Coordinator, Orange Tree Senior Apartments – Joined PEP Housing in July 2021

Jennifer Lake Resident Services Coordinator – Joined PEP Housing in January 2023

OPEN Resident Services Coordinator – Enthusiastically awaiting to fill role.

OPEN Resident Services Coordinator – Enthusiastically awaiting to fill role.


The Department of Housing Development is responsible for creating new affordable housing opportunities for PEP Housing. The department identifies potential acquisitions, conducts feasibility studies and entitlement work, obtains financing, and oversees construction. In order to best serve the needs of the very low-income population, the department works diligently to stay on the cutting edge of innovation in terms of both financing and construction methods. The department also works with for-profit developers of larger projects, providing project enhancement and management expertise in the affordable housing arena, allowing both parties to achieve individual and mutual objectives.

Jim WallenDirector of Housing Development

Jim joined PEP Housing in December 2017 as the Director of Housing Development. He comes from a family that has been in the real estate and construction industries for decades. Jim has over 30 years of experience in cross enterprise operations management, sales and marketing. Jim brings an innovative, results-driven professional leadership style creating fluid team dynamics, effective solutions-oriented problem solving and construction development management. He graduated from Chico State University in Business Administration Financing, with an emphasis in Real Estate Management.

Kyle Muelrath, Project Manager – Joined PEP Housing in January 2023

Lynsey Serpa, Project Coordinator – Joined PEP Housing in August 2022


The Department of Accounting is responsible for all the financial affairs of the organization, including preparation of periodic financial statements and acting as liaison with the organization’s independent auditors. The department maintains effective internal controls that guarantee the safeguarding of company assets.

Director of Accounting – Enthusiastically awaiting to fill role.

Amanda Cook, Staff Accountant – Joined PEP Housing in April 2016

Kathy Bellefeuille, Senior Accountant/Payroll Specialist – Joined PEP Housing in February 2019

Accounts Payable Clerk – Enthusiastically awaiting to fill role.


The Department of Property and Compliance works to ensure compliance with all local, state, and federal regulations that govern PEP properties. The Department maintains a complete and thorough understanding of all regulations related to property management and fair housing, ensures the implementation of such regulations and completes all required reporting.

Dominic Roybal, Director of Property Management

Dominic joined PEP Housing in August 2010. He is a native Californian, having deep roots in Sonoma County. Dominic has worked in the property management industry for over 20 years and has a broad range of experience in the affordable housing industry. He is dedicated to helping people, often volunteering in the community. He is driven to provide senior residents with caring, compassionate, and outstanding service. His focus during his time with PEP Housing has been on the property management side of the organization.

OPEN – Operations Manager –Enthusiastically awaiting to fill role.

James PeavlerProperty Management Coordinator – Joined PEP Housing in February 2023


PEP Housing employs resident managers that live and work on-site at PEP Housing’s larger properties. Managers oversee the day-to-day operations of the properties, process annual re-certifications, and conduct periodic inspections of units, ensuring compliance with all relevant regulatory requirements. Managers also work regularly with residents to establish a sense of community and to ensure that their needs are being met on a daily basis.

Michael Engel – Sun House Senior Apartments – Joined PEP Housing in August 2021

Janice Costanzo – Mountain View  & Toussin Senior Apartments – Joined PEP Housing in June 2022

Dan Linberg – Vallejo Street Senior Apartments, 575 & 579 – Joined PEP Housing in December 2008

Morgan Lemos – Edith Street, Don Bennett, and Fisher I and II Senior Apartments – Joined PEP Housing in January 2014

Erika Frank – Richard Lieb Senior Apartments – Joined PEP Housing in January 2015

Mauricio Felix – Kellgren Senior Apartments – Joined PEP Housing April 2016

Erin Rehberg – Casa Grande Senior Apartments – Joined PEP Housing in February 2020

Lisa Sampaio – Orange Tree Senior Apartments – Joined PEP Housing in April 2019

Julia Bergue Vigil Light Senior Apartments – Joined PEP Housing in February 2023

Maribeth D’AmatoCaulfield Lane, Herb Lee and Duplex Senior Apartments – Joined PEP Housing in October 2019

Lyle ChambersAcacia Lane and Linda Tunis Senior Apartments – Joined PEP Housing in December 2021

Lisa Marie Risner – River City Senior Apartments – Joined PEP Housing in September 2020, left and rejoined in November 2022

Pony Express Senior Apartments –Enthusiastically awaiting to fill role.


The Compliance Department is responsible for ensuring adherence to all federal, state, local and lender/partner regulatory requirements within the organization. The compliance team works with all PEP employees to ensure an understanding of their role in remaining compliant with all regulations that govern PEP properties. The Department attends all regulatory audits and works to maintain good relationships with PEP partners by providing consistently high scores and accurate reporting. All members of the Department maintain the highest level of education by consistently attending industry trainings and monitoring for changes and updates to regulations related to affordable housing management.

Kerrily BeatonDirector of Compliance

Kerrily has 18 years of Affordable Housing Compliance experience. She joined PEP as the Compliance Manager in 2013 and in December of 2022 will create a new Compliance Department within PEP as the Director of Compliance. She enjoys keeping compliance systems well organized and on track, creating calendars, reporting timelines and policies and procedures to ensure regulatory requirements are implemented and understood by all PEP employees. Kerrily has achieved the highest level of certification from HUD and TCAC by successfully passing training courses focused on Affordable Housing, Occupancy and Compliance but knows there is always more to learn. In her off time, Kerrily enjoys baking, gardening and horseback riding and loves calling Sonoma County home.

Lisa MorrowCompliance Specialist – Joined PEP Housing in April 2022


PEP Housing’s maintenance staff ensures our properties and residents have the highest level of care available. This can range from overseeing the beautiful landscape to replacing appliances to preparing a unit for a new resident who has been on our waitlist for five or more years. The residents are familiar with and trust the staff coming into their homes. Our maintenance staff does an outstanding job maintaining PEP’s beautiful properties

Pam LemosDirector of Maintenance

Pam joined PEP Housing in May 2012. Pam came to PEP with extensive experience in the field of maintenance.  She started her career with PEP Housing as the janitor and, through hard work and dedication, earned the well-deserved title of Director of Maintenance. Pam oversees the entire department for every PEP location, including our Oroville and Ukiah properties and maintenance staff. Pam’s team ensures our properties are well maintained and apartment turnovers are perfect for the individuals patiently waiting, sometimes up to five years, to move into one of our beautiful units.

Scott Jacobi – Maintenance Supervisor – Joined PEP Housing in March 2019

Randy Miller – Maintenance Technician – Joined PEP Housing in September 2016

Jim Easter – Maintenance Technician, Sun House Senior Apartments – Joined PEP Housing in June 2018

Frank PeraltoMaintenance Technician – Joined PEP Housing in August 2017, left in 2018, and rejoined in June 2021

Chris WilliamsMaintenance Technician – Joined PEP Housing in May 2022

Nathan MitchellMaintenance Technician, Orange Tree Senior Apartments – Joined PEP Housing in November 2021