David Goldstein


As President, David Goldstein is responsible for setting Company overall strategic vision and priorities for Diamond Ventures, Inc. and DVI Equity Partners, LLC. David oversees policies for management of the Companies’ existing portfolio of real estate and technology investments and sets criteria for new investment opportunities. David’s leadership includes community service on boards including the Arizona Commerce Authority and the Tucson Airport Authority. He has more than 35 years of experience working in real estate and various operating companies. David has held the position of President of Diamond Ventures, Inc. since its inception in 1988. David began his career as a CPA at both Ernst & Whinney and Cooopers & Lybrand. He also served as Vice President of Acquisitions and Sales for the Venture West Group.He received his finance degree from the University of Connecticut and has his M.B.A. degree from the University of Arizona.

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Chad Kolodisner

Executive Vice President

Chad Kolodisner joined Diamond Ventures in 2004. As Executive Vice President, he is responsible for overseeing the Company’s internal operations as well as implementing the Company’s strategic business plan. He leads company negotiations with strategic partners, including structuring ventures and dispositions. Additionally, Chad oversees new real estate acquisitions and investments in growth companies. Chad’s experience in real estate transactions emphasizes master-planned communities. He serves as the primary contact for the Company’s Rocking K and Verano developments in Tucson AZ and Saddleback Heights in Phoenix AZ. In addition to his experience as an attorney with private law firms, Chad worked with Del Webb and Pulte Homes in Phoenix. He received his finance degree from Arizona State University and his juris doctorate degree from Harvard Law School.

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William Kelley

Chief Financial Officer

Bill Kelley heads Diamond Ventures commercial division, which consists of a portfolio of industrial, office, retail, mixed-use and hospitality assets. In addition, as Chief Financial Officer he is responsible for corporate financial planning and project financing. Bill is active in regional economic development efforts and directing the Company’s acquisition of income-producing properties. Bill’s commercial real estate experience includes over $1 billion dollars in real estate transactions.  Prior to joining Diamond Ventures in 2000, Bill had senior management and executive positions with Bourn Properties, Inc., Venture West Group, Inc., and Ernst & Whinney. He received his accounting and finance degree from University of Arizona.

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Mark Weinberg

Senior Vice President

Mark Weinberg is responsible for overseeing the Company’s residential division which includes acquisition, planning, entitlement, construction and management of custom lot communities, builder neighborhoods and master planned communities. He leads the Company in adding value to the existing residential portfolio. Mark oversees the Company’s commitment to identify, perform due diligence, acquire and develop new residential properties within AZ and represents the Company on builder joint ventures. He is experienced in Arizona land development and project construction. Since joining Diamond Ventures in 1994, Mark has served as the Project Manager on several of award-winning custom home, builder neighborhoods and master-planned communities. Prior to joining Diamond Ventures, Mark served as the General Manager for the Canada Hills Development Company where he was responsible for overseeing the development and management of a resort hotel, country club, golf courses, a utility company and various real estate projects. He received his business administration and psychology degree from the University of New Hampshire.

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Priscilla Storm

Vice President

Priscilla Storm leads the Company’s government relations and public policy advocacy. Priscilla oversees marketing, investor relations and special projects for the Company’s portfolio. She is active in identifying and evaluating real estate opportunities and oversees Company investments in central Texas. Priscilla serves as the bilingual liaison to Diamond’s holdings in Mexico and also serves as President of Old Tucson Company. Prior to joining Diamond Ventures in 2001, Priscilla’s diverse experience included executive positions in the public, private and non-profit sectors including Native American government, landscaping, healthcare and banking. She received her degree in communications and U.S. border studies from Trinity University and her M.B.A. degree in international trade from Texas A & M International University.

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Robert Tucker


A licensed civil engineer, Robert Tucker is responsible for project management of the Company’s residential and commercial development projects including preliminary due diligence, acquisition, entitlement, design, construction and disposition. He leads the Company as the Project Manager for the Rocking K master-planned community located in southeast Tucson in the community of Vail, AZ and has over 25 years of experience in project management. Prior to joining Diamond Ventures in 2004, Robert was an engineer at MMLA (Psomas) where he specialized in infrastructure and commercial development and residential subdivisions with an emphasis on master-planned community work with national and regional homebuilders. He received his civil engineering degree from the University of Arizona.

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Bob Griffin

Managing Partner for DVI Equity Partners

As the Managing Partner for DVI Equity Partners, Bob Griffin is responsible for the companies technology investments and portfolio management. DVI Equity Partners was formed as a new venture capital entity in 2018. Under Bob’s leadership, DVI Equity Partners, LLC identifies and analyzes investment opportunities in early stage, emerging technology companies. Bob’s goal is to identify entrepreneurial companies with an emphasis on disruptive technologies. Bob has been a successful serial entrepreneur in the Software and Services industry for more than 35 years. Prior to joining Diamond Ventures, Bob most recently was the Chief Executive Officer for Ayasdi a Silicon Valley Start-up out of Stanford University. In Oct. of 2011 he facilitated the sale of his company, i2, to IBM where he remained as the General Manager for the Safer Planet and Smarter Cities brand until 2017. Bob conducted his undergraduate studies in Business Management at Franklin Pierce College in New Hampshire. He is a distinguished alumnus of the Naval Post Graduate School’s Center for Homeland Defense and Security’s Executive Leadership Program in Monterey, California.

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Helaine D. Levy


Helaine is responsible for guiding the implementation of Donald R. Diamond, the Founder’s vision for the Companies. She is also the Executive Director of Diamond Family Philanthropies and oversees the philanthropy for her family, the Diamond Foundation and Diamond Ventures. Helaine participates with David Goldstein, President and the Partners on the Companies’ strategic decisions. Helaine actively engages with community leadership organizations on behalf of the Companies and the Foundation.  She has been associated with the Company since 1998.  Prior to assuming her current position, Helaine was President of Old Tucson Studios. She received her journalism degree from Boston University. Helaine is a Fellow of the Harvard University Advanced Leadership Initiative.

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Donald R. Diamond


Donald Diamond founded Diamond Ventures in 1988, after having been an opportunistic investor in Arizona real estate and partner in a diverse array of operating businesses. A visionary and entrepreneur, Mr. Diamond established Diamond Ventures to expand acquisition and investment activities, while adding management and development capabilities. As Founder, he worked with the Company’s senior management until his passing in 2019, providing strategic guidance and resources for the Diamond Ventures portfolio for today and in the future. Donald Diamond’s legacy with the company continues with his daughter Helaine Levy and grandson Nathan Levy actively involved in the business. Prior to moving to Arizona, Mr. Diamond had a successful career as a commodities broker on Wall Street. Mr. Diamond is remembered for his charismatic personality, keen business acumen, commitment to perpetual learning, engagement in world affairs and government policy and his family’s generous support of charitable causes.


Dee Alexander, Corporate Secretary/Human Resources
Brian Deatherage, Construction Controller
Bert Dover, Director of Acquisitions
Bob Kolt, Construction Manager
Shannon Murphy, Designated Broker
Fernanda Quintanilla, Director of Special Projects
Sam Sufi, Real Estate Development Manager
Tom Zoline, Treasurer/Controller