Logix Federal Credit Union announced Monday that Logix Chief Operating Officer Ana Fonseca will succeed Dave Styler as president and chief executive, who is retiring after 18 years at the helm. “I look forward to this leadership role and continuing to champion our culture and core values,” Fonseca said in a statement. “After working at Logix for more than 26 years, my goal is to maintain our culture of service and success, providing our members with the best possible combination of financial value, service experience, and convenient access through technology.” Logix, which is moving its headquarters from Burbank to Valencia, is the largest credit union in Los Angeles County. It has more than 190,000 members and nearly $6 billion in assets.