Robert Thiergartner

Principal & Chief Investment Officer

Robert J. Thiergartner serves as a Principal and Chief Investment Officer of Bircher Anderson & Davis, serving on the Board of Directors and Investment Committee, and leading the acquisition and development platform.


In his over 40 years of industry experience, Bob emphasizes cultivating long-term relationships with institutional and private clients and investors from across the real estate spectrum while never losing sight of his commitment to accountability and clear judgment.  In addition, he has been instrumental in developing and investing in business parks and industrial and office properties.  After becoming the owner of Davis Partners, Bob combined Davis Partners’ full-service operating business with Birtcher Anderson to form Birtcher Anderson & Davis.


Bob joined Davis Partners after graduating from college as a student/athlete and working at Arthur Andersen & Co.  During Bob’s career, he has also completed the Advanced Management Development Program in Real Estate at Harvard University’s Graduate School of Design.


In addition to his work at Birtcher Anderson & Davis, Bob has taken on leadership roles that draw deeply from his loves of business, philanthropy, and education.  He is a past Chairman of the Orange County Boy Scouts of America; served on the board of Christ Catholic Cathedral Corporation and was a member of the Architecture and Renovation Committee; a former President of Legatus International Orange Coast Chapter; and was Chairman of the ULI Small Scale Development Council Blue Flight and a Council Counselor for the Urban Land Institute (ULI).  Bob is a former member of the Consultative School Board of Santa Margarita Catholic High School and served as a Court Appointed Special Advocate in Orange County.  Additionally, he is a long-time Director of Caritas Corporation, a non-profit specializing in affordable housing throughout California.  Bob and his wife, Lesley Bohm Thiergartner, a widely respected portrait photographer, live in Orange County.