The Calabasas Chamber of Commerce is looking for a new leader after Pamela Kissel, the former chief executive, unexpectedly stepped down last month. Bridget Karl has stepped in as interim chief executive, a post she will hold until starting a new job in July. Karl led the Calabasas Chamber from 2012 to 2016. Kissel is now serving as marketing and events director at the Greater Conejo Valley Chamber of Commerce in Westlake Village. “We’re so happy to have Pam Kissel,” said Conejo Valley Chamber Chief Executive Jill Lederer. “She did a stellar job in Calabasas and has hit the ground running here at the Greater Conejo Chamber.” The move comes as the Greater Conejo Chamber’s marketing department grows from two people to three — Sophie Battershell was recently hired as marketing and communications coordinator. Lederer said her staff has grown to 11 people in step with expansion of the chamber’s programs and services.