A San Francisco based commercial real estate firm dedicated to achieving superior investment returns for its clients and partners.

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Our Team

Rob Dumas and Pat Hubbard founded Sansome Street Advisors in 2007 after a combined 30 years in San Francisco commercial real estate brokerage with expertise in acquisitions, dispositions, project renovations, leasing, repositioning and finance. SSA has since expanded through affiliate companies SSA Real Estate Management into property management and SSA Investment Partners into property ownership as both general and limited partner.
Robert DumasPrincipal

Robert Dumas


Rob co-founded Sansome Street Advisors in 2007 and oversees acquisition, disposition, asset management and financing related activities. Prior to founding SSA, Rob was with Grubb & Ellis from 1996-2007 completing more than $1 billion in investment sales.

From 1993-1996 he was an office leasing broker with Stubbs, Collenette & Associates. Rob received a Bachelor of Arts from University of California, San Diego.

Patrick HubbardPrincipal

Patrick Hubbard


Pat co-founded Sansome Street Advisors in 2007 and oversees leasing, construction and asset management related activities. Prior to founding SSA, Pat served as a Senior Vice President at Grubb & Ellis and Transwestern Commercial Services.

Pat received a Bachelor of Arts in history from the University of California, Berkeley.

Nate Crawford

Nate Crawford

Nate is an integral part of the Sansome Street Advisors brokerage team. A proven leader in the San Francisco commercial real estate market, Nate has completed hundreds of leases and sales transactions throughout his career. Prior to joining SSA, Nate was a Vice President in the San Francisco office of Newmark Grubb Knight Frank.

Nate received a Bachelor of Science in Economics from the University of California at Davis. He and his wife along with their two sons reside in Hillsborough.

Jeff LeibergProperty Manager<br>SSA Real Estate Management

Jeff Leiberg

Property Manager
SSA Real Estate Management

Jeff has over 20 years’ experience in commercial and residential real estate property accounting and management. Prior to joining SSAREM Jeff managed properties at Jones Lang LaSalle and Colliers International for clients including Dignity Health, Veritas and Cirrus.

Jeff received a BA in Business Administration from Western Michigan University.

Justin BlandFacilities Technician<br>SSA Real Estate Management

Justin Bland

Facilities Technician
SSA Real Estate Management

Justin is responsible for the maintenance and mechanical upkeep of SSAREM’s portfolio working in conjunction with preferred vendors. He offers expertise in customer service and prides himself on being proactive in facilities management.

Mariana Agudelo PosadaMarketing & Design Creative

Mariana Agudelo Posada

Marketing & Design Creative

Mariana is a versatile professional that manages and designs all marketing campaigns for each listing, guaranteeing maximum exposure to the tenant and broker communities. Marketing campaigns include photography, custom flyers, email blasts, corporate sheets and social media exposure and more. She optimized processes and crafts high-impact proposals and presentations utilizing technical skills in Illustrator, Indesign and Photoshop.

Mariana received her Bachelor of Arts degree in Graphic Design from the University of San Buenaventura of Medellin, Colombia.