Our Team

Board of Directors

Timothy Michael Kral 

Prior to founding Siembra, Tim was a corporate finance executive for 25 years building, leading and advising corporations through complex capitalizations, expansion, and capital market transactions.  Tim is originally from Palo Alto, from a family of researchers at Stanford, studied Social Ethics and Political Geography, Windy Hill Prep Academy, an avid surfer, Sealfit enthusiast.

Kenneth Goldman

Kenneth Goldman, President Hillspire and Former CFO Yahoo. Goldman is the former chief financial officer of Yahoo. Prior to joining Yahoo, Goldman served as chief financial officer at Fortinet. Goldman also served as chief financial officer of Siebel Systems. During a professional career spanning more than 40 years, Goldman served as chief financial officer of multiple public and private companies and helped take three companies public. In addition, Goldman's experience includes board director, audit committee chair and financial advisory roles at more than 40 corporate boards, of which over 10 have gone public while he was a board member.

Dr. Joseph Brown

Dr. Joseph Brown, Graduate Diversity Recruitment officer, and Associate Director, Diversity & First-Gen Office at Stanford University.  Joseph  works to support new generations of scholars that reflect the diversity of intellectual perspectives in society. He develops programs tailored to the specific needs of students from a variety of backgrounds and guidance toward the completion of their academic goals. Joseph has a Ph.D. from Stanford University with research work under the tutelege of  Dr. Claude Steele.

Dean Florez

Dean Raymond Florez was a California State Senator from the 16th Senate District from 2002 until the end of his second term in November 2010. Florez was born and reared in the Central Valley. He was first elected to the California State Assembly in 1998 and served two terms. Dean is a graduate of Harvard Business School and holds a bachelor’s degree in political science from UCLA, where he served as student body president.

Randall Martinez

A/E/C Industry Executive, Responsible Civic Leader with Board-level ESG Experience, Supporter of Arts and Humanities.  Nearly 30 years of industry experience, Randall directs and oversees the statewide operating sectors of a nationally recognized leader of public infrastructure development.   

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