Mike Wardenburg

Mike Wardenburg
Private Client Group


Mike Wardenburg, an integral part of Costello & Sons Insurance (CSI) review process for Wealth Managers and their clients, focuses on the High Net Worth Individuals and Family Offices. Mike works closely with clients to identify gaps in coverage and provide the coverage they need to better protect their assets and income. Mike joined CSI in 1998, and within 4 years was asked to become a Principal in the firm. “It says a lot about Mike,” states Bryan Costello, the company’s third generation CEO.

Asset & Income Protection for High Net Worth Individuals and Family Offices. Mike consults with you directly to understand your unique needs and apply that knowledge in consultation with the top affluent-focused insurance companies to tailor a seamless personalized program. The net result is unrivaled efficiency and peace of mind. This program can include High Excess/Umbrella Liability, Homes, Earthquake, Yachts, Aircraft, Autos and Collectibles Worldwide.

Professional / Advisory

  • National Council for AIG, ACE, Chubb & Fireman's Fund
  • California Northstar Chair for Encompass
  • Recognized as a Top Producer in his field for Family Offices and High Net Worth Individuals
  • Frequent contributor on insurance matters for the San Francisco Chronicle and Marin Independent Journal
  • Recognized by Fireman's Fund as one of their Top Producers 6 years in a row

Mike lives in Novato, CA with his wife of 22 years, Lisa, and their two children.  Andrew attends Loyola Marymount University and Eric is currently attending Marin Catholic High School.  Mike and his sons are avid Motocross riders along with a high dose of wrestling, lacrosse and basketball.  Mike contributes to Summer Search, which helps low-income young people graduate from high school, and has worked with CASA (Court Appointed Special Advocate).  Mike and his family enjoy their Tahoe cabin, skiing, hiking, mountain biking and trips to the beach along Lake Tahoe. Enzo the Black Lab is not far behind.



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