Katherine A. O’Brien

Katherine joined Mullen and Filippi in March 2016 as an Associate Attorney and became an Associate Partner in July 2018. She has practiced law in the area of workers’ compensation since 2012, when she initially became a member of the State Bar of California. Prior to joining Mullen and Filippi, Katherine worked for a prominent California workers’ compensation defense firm, where she co-managed their developing Los Angeles office. She has practiced throughout Southern California representing the interests of insurance carriers, self-insured entities, and the California Insurance Guarantee Association and has appeared at numerous WCAB district offices throughout the Los Angeles, San Diego, and Inland Empire regions.