SKDKnickerbocker is handling the Chapter 11 filing of California Pizza Kitchen, which is restructuring to reduce its debt and shutter money-losing restaurants.
The "unprecedented impact of COVID-19" on CPK's business also triggered the need to declare bankruptcy, according to CEO Jim Hyatt.
He views the financial reorganization as "a step towards a stronger future" for the chain of more than 200 restaurants.
Founded in 1985 in Beverly Hills, CPK is expected to emerge from Chapter 11 in three months.
Heather Wilson, who heads SKDK's west coast operations, is working the CPK filing.
Mark Penn's Stagwell Group owns SKDK.