About Us

Diablo Holdings, Ltd.  is a Property & Asset Management Company representing The Lineweaver Trust, a private investment company. Diablo Holdings, Ltd., a California corporation, employs a staff of 8 in its Alamo and Berkeley (Contra Costa County) offices, and manages real estate assets in Alameda and Contra Costa Counties.
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Diablo Holdings was originally formed in 1972 under the name Bay Cities Realty, and the company name was changed in 1974 to Diablo Holdings, Ltd.  The company was incorporated in 1979, as company interests expanded throughout the 1980’s and 1990’s to include investments in other businesses, involving out-of-state real estate, mining and quarrying interests, and an import/export company.  Diablo also provided operational management for a non-profit organization, The Danny Foundation for Crib and Child Product Safety, which dissolved in 2005.  Diablo Holdings, Ltd. is a wholly owned subsidiary of The Lineweaver Trust.

Office Space Berkeley, CA
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Office Space Hercules, CA

John L. Lineweaver, Trustee of The Lineweaver Trusts, is a 48-year veteran of the real estate industry, having obtained his California Real Estate License in 1969. After working as a loan officer in the construction lending department of a major national bank, he formed Bay Cities Realty in 1972, and was involved in traditional commercial and multi-family brokerage transactions over the ensuing 2 years. In 1974, Mr. Lineweaver formed Diablo Holdings, Ltd., and changed his focus from brokerage to development, specifically to the purchase and renovation of commercial and multi-family residential buildings. To accommodate the Property Management aspects of his business, Mr. Lineweaver incorporated Diablo Holdings, Ltd. on July 10, 1979, as a California corporation. Diablo Holdings, Ltd currently oversees 8 employees, and is wholly owned by The Lineweaver Trusts, of which he is Trustee.

Over the past 43 years, John Lineweaver, through Diablo Holdings, Ltd., has developed, renovated, owned and managed office, retail and residential properties, ranging from single family homes to a 92,000-square foot, 4-building office complex. Currently, Diablo Holdings manages nearly 175,000 square feet of retail and office space.

Mr. Lineweaver has also founded and managed a diverse set of businesses outside of the real estate industry. In 1986, Mr. Lineweaver co-founded Table Mountain Quarry, a start-up rock and gravel quarrying operation in Northern California. Mr. Lineweaver was Chief Financial Officer of the Corporation for seven years, and oversaw the design, purchase and installation of several million dollars’ worth of quarry operating equipment, as well as a complex Environmental Impact Report process. In 1996, Lineweaver and his partner sold Table Mountain Quarry to a predecessor of Vulcan Materials, Inc, which extended the quarry’s mining permit and his royalty rights to 2029.

In 1988, Mr. Lineweaver co-founded Unique Quilts, Inc., an import/export company which initially designed, manufactured and imported handmade quilts and related products from mainland China. The company was sold in 1993.
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More recently, Mr. Lineweaver has become involved in a variety of other non-real estate activities, ranging from purchasing food-service franchises to investment in ranching and agricultural activities.

Andy Lineweaver is the Vice President, Property Management of Diablo Holdings, Ltd. He has been with Diablo Holdings since 1989. He is responsible for the daily operations and maintenance of all facilities as well as construction and renovation projects that has totaled close to $1million over the past 18 months. He is proud and confident in his team members that he supervises and consequently most commercial and residential tenant improvement projects and daily maintenance activities are done “in-house”.
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Andy is the father of two wonderful adult children. His daughter, a recent graduate of Saint Mary’s College and a son that is pursuing a firefighter paramedic career, studying fire science and currently working as an EMT. Andy’s wife of 24 years, Amber, is a beloved teacher at Northgate High School in Walnut Creek. In his spare time, he loves to go on weekend Tahoe trips with his family, working on home projects, and taking in sporting events. He also still enjoys working out and playing basketball at his local club and encourages others that are looking for a natural stress relief to do the same.

Jacqueline, “Jacqui”, holds the position of Administrative Assistant to the President of Diablo Holdings, Ltd.  In this position, Jacqui serves as a property management liaison and assists in the coordination of special projects and events held by Diablo Holdings, Ltd. Jacqui provides administrative, technical and logistical support for multiple projects, meetings, and ceremonies.

Jacqui joined Diablo Holdings, Ltd. in January 2017. Prior to her position at Diablo Holdings, Ltd., she worked at Holy Names University, Oakland for 5 years, and served as Interim Operations Analyst for the Department of Nursing the last 6 months of her tenure. Jacqui reported to the Nursing Department Chair, and provided administrative and technical support to the Nursing Department. During Jacqui’s interim position as Operations Analyst, Jacqui continued her position as Simulation Center Assistant and Health and Safety Liaison.

Jacqui attended California State East Bay, where she studied Sociology and Human Development. Jacqui also attended Chabot College and Las Positas College, where she became interested in Real Estate studies. Jacqui has owned a business for the past 14 years, which primarily focused on marketing specialized affordable housing units, and pre-qualifying and underwriting First Time Homebuyers for community development programs design by local, state, and federal municipalities.
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Jacqui has a son, Dallas, who is an aspiring rapper and performer and her biggest star.  In Jacqui’s spare time she enjoys spending time with her husband, Gary, going to Bay Area sporting events, trying new restaurants in the East Bay and visiting the various California wineries.

Eileen is an Administrative Assistant on the Diablo Holdings, Ltd. Property Management Team.  Apart from fulfilling general office and administrative tasks for the office of property management, she provides support to, and works in partnership with, the members of management in business communication with owners, tenants and vendors to promote business success.

Eileen began her property management experience in 1979 as an Apartment Manager of a 64-unit Victorian apartment building near Lake Merritt in Oakland, CA, where she gained vital experience working with owners, tenants and vendors.  She started her family shortly afterward and changed career fields while raising her young family.  Eileen’s gained administrative, educational and business experience, within several different occupations, has attributed to her being well-rounded with sound communication and management skills.

During the extremely busy years of growing their family, Eileen and her husband, Clark, served on the PTA and were board members of their children’s school program.  Eileen eventually became a Home Educator of their four children.  Throughout her education career of more than 15 years, she served her local home school community (over 100 families) in various capacities, including but not limited to: Board Member, Athletic Director, Event Coordinator, Jr High/High School Spanish Instructor.  Together they also filled many leadership roles in their church of over 25 years.

Eileen and Clark recently celebrated their 30th wedding anniversary.  The greatest joy of their lives is spending time together with their son, three daughters and spouses as they raise their own families.  So far, they are delighting in their 12 grandchildren … and there are more to come.