Susan “Knell” Bumbalo joined Jackson & Campbell in 2010 and is a Senior Counsel in the Insurance Coverage Practice Group. She has nearly 15 years experience handling insurance coverage disputes under general liability and professional liability policies.

Knell represents some of the largest insurance companies in the United States analyzing insurance coverage under various types of policies for large commercial losses with emphasis on construction defect, environmental, bodily injury and product liability claims. She drafts coverage opinions and coverage position letters and participates in all phases of litigation regarding coverage issues. Knell has extensive experience in multi-district litigation.  On occasion, she lends her expertise to professional liability coverage cases.

Prior to joining Jackson & Campbell, Knell practiced insurance coverage law in the San Francisco Bay Area with an emphasis on environmental and construction defect coverage.

Knell graduated from Mount Holyoke College with a B.A. in Geography. She earned her J.D. from the University of Notre Dame Law School, where she was a legal writing and moot court teaching assistant during her third year.

Knell is admitted to practice law in California and the District of Columbia.

In her spare time, Knell volunteers as a Girl Scout Troop leader and has lead troops from Daisies (grades K-1) to Cadettes (grades 6-8).


Successfully represented an insurance company as second chair for a trial in the United States District Court for the Northern District of California and its Appeal to the Ninth Circuit Court of Appeals for an environmental contamination case.

  • October 2017
    Susan Knell Bumbalo article published in DRI’s For the Defense

    Susan Knell Bumbalo, an attorney in our Insurance Coverage group, wrote an article entitled "Examining Insurers' Obligations to Their Insureds Post-Verdict", which appears in this month’s edition of DRI’s For the Defense.  The article addresses insurer’s duty to appeal and issues associated with various issues that arise when insureds/insurers face an adverse jury verdict.  The article is a good roadmap and... Read More >