Andrew Dilfer, SIOR, GLS, has been elected President of the Society of Industrial and Office Realtors® (SIOR) Greater Los Angeles Chapter, and Marc Bonando, SIOR, has been appointed to the chapter’s Board of Directors. Both appointments took effect October 15, 2026.
As President, Dilfer will lead the Board of Directors, advance regional membership initiatives, and promote professional standards across Southern California’s commercial real estate sector.
Dilfer is an Executive Vice President in Kidder Mathews’ El Segundo office, with more than 20 years of experience specializing in industrial properties throughout the South Bay and Greater Los Angeles markets. He has held the SIOR designation since 2019 and previously served on the chapter’s Board of Directors.
“I’m honored to serve as president of the SIOR Greater Los Angeles Chapter and build on the strong foundation established by those who have led before me,” said Dilfer. “SIOR plays an important role in bringing together industrial and office real estate professionals, fostering collaboration, and supporting the continued growth of our industry,” said Dilfer. “I look forward to working with our board and members to strengthen those connections and create new opportunities.”
Bonando serves as Senior Vice President and Managing Director of Kidder Mathews’ El Segundo office. With more than 23 years of experience, he specializes in industrial properties throughout the South Bay and Greater Los Angeles markets and has held the SIOR designation since 2014.
“I’m pleased to join the Board of Directors and contribute to an organization that has earned such a strong reputation across our industry,” said Bonando. “SIOR provides tremendous value through its professional network, educational opportunities, and commitment to excellence. As a board member, a key priority for me will be engaging the next generation of commercial real estate professionals and ensuring the chapter continues to evolve to meet the needs of its members.”
The SIOR Greater Los Angeles Chapter oversees local operations, member networking and educational events, sponsorships, regional commercial real estate initiatives, and charitable and scholarship programs. Established in 1946, it is one of the oldest and largest SIOR chapters in the United States, with more than 130 members.
For more than 80 years, the Society of Industrial and Office Realtors® has been a leading global professional association for industrial and office real estate specialists. With 4,000 members across 50 countries, SIOR represents experienced commercial real estate brokerage professionals who meet rigorous standards for transaction volume, professional education, ethics, and peer endorsements. Kidder Mathews has 43 SIOR designees among its brokers.
About SIOR
The Society of Industrial and Office Realtors® (SIOR) is the leading society for industrial and office real estate professionals. Individuals who earn their SIOR designation adhere to the highest levels of accountability and ethical standards. Only the industry’s top professionals qualify for the SIOR designation. For more information, visit sior.com.
About Kidder Mathews
Kidder Mathews is the largest fully independent commercial real estate firm in the Western U.S., with over 900 professionals in 20 offices across Washington, Oregon, California, Nevada, Arizona, and Texas. We offer a complete range of brokerage, appraisal, asset services, consulting, and debt & equity finance services for all property types. Kidder Mathews averages $9 billion in transaction volume, manages 55 million square feet of space, and conducts nearly 2,700 appraisal, consulting, and cost segregation assignments annually. For more information, visit kidder.com.
