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CGS3 Partner Lauded as One of San Diego’s Most Influential Business Leaders

November 14, 2023 Sean Southard CGS3 Team

SAN DIEGO – Sean Southard, a founding partner of Crosbie Gliner Schiffman Southard & Swanson (CGS3), has been recognized by the San Diego Business Journal in its annual SD 500 edition, which spotlights the city’s most influential business leaders.

Published on Nov. 13, the 2023 edition of the San Diego Business Journal’s SD 500 honors San Diego’s 500 most influential business leaders – all top professionals who make a significant impact on the San Diego business community and the community at large.

A top attorney in his field, Southard is well deserving of this latest accolade. Prior to helping launching CGS3, he was a partner in a Big Law firm – and embarked on a legal career following a four-year tenure as a U.S. Navy officer, serving tours in Iraq and Somalia. 

Throughout his 25-year legal career, he has successfully completed major leasing transactions totaling more than 10 million square feet of space across all sectors of commercial real estate, including retail, industrial, and office, with special

As one of the five original founding partners of CGS3, Southard has played a critical and proactive role in creating the firm’s “different by design” architecture that has led to and sustained growth, a marquis list of institutional clients and a recognized brand of legal excellence. Celebrating its ten-year anniversary this year, CGS3 now employs 30 professionals working collaboratively to complete high-profile real estate deals throughout the United States.

Southard holds a Bachelor of Arts degree in international relations from University of San Diego with a Bachelor of Arts degree and his J.D. from Loyola Law School Los Angeles.


About Crosbie Gliner Schiffman Southard & Swanson LLP (CGS3)

CGS3 is a recognized leader among a new generation of commercial real estate law firms with practice areas covering the entire commercial real estate life cycle, including finance, acquisition/disposition, entity formation, tax, development, land use, leasing, distressed asset workouts and dispute resolution. Earning a reputation as one of California’s leading commercial real estate law firms, CGS3 continues to recruit some of the state’s top real estate attorneys from both large corporate firms and senior in-house positions. For more information, visit