Senior Leadership

Decades of experience, deep local knowledge and a shared commitment to our tenants, partners and communities.

Alex Zikakis

Alex Zikakis

President & Founder

Founded Capstone in 1996. Named GlobeSt.com's 'Best Bosses' and SDBJ CEO of the Year; leads the firm's investment strategy across commercial and residential platforms.

Jay Matthes

Jay Matthes

Chief Operating Officer

Oversees day-to-day operations, legal, and the firm's institutional joint venture relationships across the Capstone platform.

Mark Hayden

Mark Hayden

SVP of Development

Leads entitlement and ground-up development, with a focus on master-planned residential and commercial projects throughout the Western U.S.

Paul Kneisel

Paul Kneisel

VP of Finance & Accounting

Directs financial operations, reporting and capital planning across Capstone's owned and joint-venture portfolio.

Gabi Davis

Gabi Davis

VP of Property Management

Recognized as a 'Leader of Influence in Commercial Real Estate.' Runs tenant-first property management across retail, office and industrial assets.

Nick Kolbe

Nick Kolbe

Director of Acquisitions

Leads the firm's underwriting and acquisitions pipeline. Named a 'Leader of Influence in Commercial Real Estate 2025.'