Years of Company Event Tradition

The fuel to our CSI Engine!

Years Average Tenure at CSI

Our employees love us back.


CSI Retreats

Our most anticipated event on the CSI calendar! These retreats allow us to getaway, decompress, and leave re-inspired.

CSI Retreat Team Building Videos

A staple of our CSI retreats are our friendly competitive group challenges.


Team Building - Cooking Class

At CSI we are cooking with gas!

Team Bonding - Annual Wine Tasting Trip

Our Annual Wine Trip brings all of our offices together to toast our mutual success.


CSI Gifts

We like to reward hardwork

CSI Holiday Party

We enjoy celebrating together and reflecting on what the holidays are truly about - family.

Our offices across California

We base our locations wherever our centralized talent lives.

San Francisco

750 Battery Street, 7th Floor, San Francisco, CA 94111


Orange County

9870 Research Drive, Irvine, CA 92618


Marin County

1752 Lincoln Avenue, San Rafael, CA 94901


Santa Barbara

812 Anacapa Street, Suite A, Santa Barbara, CA 93101

Interested in joining the CSI team? Contact us below!


Contact Information

At Costello and Sons, we’re always looking for talent that will fit our culture and our work ethic.  In a small business environment, each employee has the ability to make a large impact on the business and office dynamics which is why we take a selective approach to hiring.

If you enjoyed our culture site, please take a look at our more serious side, our business site, which can be found by clicking the button at the bottom of this page.

If you’re interested in joining our CSI family/team or have questions for us, please send us a message in the box to the right!

1752 Lincoln Avenue, San Rafael, CA 94901
Email:  info@costelloandsons.com
Phone: +1-415-257-2100  Fax:  +1-415-455-1516

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