Executive Management: Alliant Insurance Services

Thomas Corbett serves as Chairman and Chief Executive Officer of Alliant Insurance Services, Inc. In addition, he sits on the board of directors of Alliant Insurance Services. Corbett joined Alliant Insurance Services in 1977 as a producer and launched the company’s Newport Beach-based public entity group. Prior to joining Alliant Insurance Services, Corbett was with Allendale Insurance in Los Angeles and spent three years as a loss prevention engineer at Factory Mutual Engineering Association. Corbett is a graduate of California State University, Long Beach. He is currently involved in various community and charitable organizations.

Tom Corbett 
(949) 756-0271

Greg Zimmer serves as President and Chief Financial Officer of Alliant Insurance Services, Inc., and is a member of the company’s board of directors. In conjunction with other members of senior management, Zimmer is responsible for implementing the strategic direction of the firm. He also is responsible for corporate operations and all mergers and acquisitions activity. Prior to joining Alliant Insurance Services in 1998, Zimmer and his partners built a significant financial services firm that ultimately was sold to GMAC, where he served as Senior Vice President. His career also includes corporate finance and venture capital experience while serving as Vice President at Security Pacific, which ultimately merged with Bank of America. Zimmer holds a bachelor’s degree in economics/systems science from the University of California, Los Angeles (UCLA) and a master’s degree from the Anderson Graduate School of Management at UCLA.

Greg Zimmer
(949) 660-8102

Jerold Hall serves as Senior Executive Vice President and Chief Operating Officer of Alliant Insurance Services, Inc., and sits on the company’s board of directors. His responsibilities are principally focused on the national sales and service operations of the company. Hall joined Alliant Insurance Services in 1988 as a surety broker and assumed the role of Chief Operating Officer in 1996. He began his insurance career in 1981 after earning his bachelor’s degree from Central Michigan University, where he majored in business administration and psychology. In 1993, Hall received his master’s degree in business administration from San Diego State University.

Jerry Hall
(949) 660-8182

Diana Kiehl serves as Chief Administrative Officer of Alliant Insurance Services, Inc. In this position, she partners with key executives to broaden sales and service best practices within the company’s numerous specialty groups and practices. In addition, she oversees the company’s human resources function and its client-focused business services group. Kiehl joined Alliant Insurance Services in 1991 as an associate producer and was promoted to producer in 1993, helping to build such specialty programs as the Owner-Controlled Insurance Program (OCIP) and the Hospital All-Risk Property Program (HARPP). Subsequently, she held several management positions with the company, and in 2006 was promoted to Managing Director of Brokerage Services. Her achievements at Alliant Insurance Services include the formation of highly effective operations teams and creating process improvement programs that resulted in significant savings for the company. Kiehl earned her bachelor’s degree from California State University, Long Beach, a master’s degree from Pepperdine University, and attended Wharton’s Management Education Program.

Diana Kiehl
(949) 660-8198

Ralph Hurst serves as President of the National Brokerage Group for Alliant Insurance Services, Inc., and is a member of the company’s executive committee. He has played a central role in the establishment and management of several of the firm’s major programs, including the Public Entity Property Insurance Program (PEPIP), the Hospital All-Risk Property Program (HARPP), and the Tribal Property Insurance Program (TPIP). Hurst joined Alliant Insurance Services in 1987 as a producer after a 10-year tenure with the Factory Mutual Group. He earned a bachelor’s degree in industrial technology-fire science from California State University, Los Angeles.

Ralph Hurst
(949) 660-8113

Sean McConlogue serves as President of Alliant Specialty Insurance Services and has more than 20 years of experience in the insurance industry, with particular emphasis on specialty program development. Before joining the company in 2003, McConlogue served as President of Affinity Insurance Services, LLC, and prior to that held senior-level management positions with Tristar Insurance Services, Arthur J. Gallagher & Co., and Xerox Corporation. McConlogue earned a bachelor’s degree in economics from the University of California, San Diego and a master’s degree in international management from Thunderbird, The American Graduate School of International Management.

Sean McConlogue
(858) 505-4037