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About Costello & Sons

CSI is more than just an insurance brokerage. Our company values character and the trust our clients put in us. The definition of character is who you are when no one is looking. Our clients don’t see most of what we do. Being of character that is consistent with our values defines our team. CSI wants to be your trusted advisor who protects your bottom line while you focus on the top line.

As a niche insurance specialist there is a lot about what we do that makes our firm unique, but the people who know us best would say it’s our team that makes us the most unique. Employment at CSI means more than just a place to work. It’s a place to grow, improve, challenge and serve. This section of the website will give you a different perspective of what we do and who we are. “Work hard, play hard” is often a phrase associated with our team. We take our business very seriously, but we also know when to take a moment and appreciate all the great things about each other and our families. CSI also does our best to share our good fortune with the community. Many of our employees pursue their individual passions with the support of the company, and we take many opportunities throughout the year to give back as a team.

A great product of that passion was our certification as a Green Business in 2008. One of our employees felt being paperless was just not enough, so she researched the best practices of green business. A few weeks later there were notes above each light switch, energy saving everything, no more disposable water bottles and much more. CSI encourages our employees to create the type of work environment that they want to be in.

CSI also takes pride in the business partners we’ve established that share in our values and high-level of doing business. Throughout our website we refer to our close affiliations and the endorsements we’ve received from reputable professional industry leaders. We are thankful to serve these companies and associations with our loyalty and support.

CSI continues to grow, and we are always looking for the right people to join our team. With offices located in Northern and Southern California we have opportunities available most of the time. We want every visitor to get to know us a little better, and if this seems like the type of company you are interested in, please let us know.


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