San Diego Fire-Rescue Department Chief Brian Fennessy is leaving the department to become chief of a Southern California Fire Authority. the mayor announcedThursday. Fennessy’s last day as chief in San Diego is expected to be April 13. The Orange County Fire Authority has been without a permanent chief since Jeff Bowman abruptly resigned Aug. 17 of last year, saying he was making the move with a “heavy heart” but giving no reasons. Authorities also gave no reason for Bowman’s sudden departure after he served roughly three years in the post. Patrick McIntosh was appointed interim fire chief by the OCFA Board of Directors on Sept. 28 to serve until a new chief was hired. Orange County Fire Authority official told FOX 5 Thursday morning they haven’t officially confirmed a new chief and plan to make an announcement on March 15.