COMINGS AND GOINGS Signet Jewelers has appointed Joan Hilson as its new chief financial officer. She previously served as CFO for David’s Bridal and replaces Michele Santana. The company has also promoted Jamie L. Singleton to president of the Kay, Zales, and Peoples nameplates. Prior to her promotion, Singleton served as executive vice president of Zales and Peoples. Kecia Caffie has been promoted to senior vice president of Piercing Pagoda. She previously served as that brand’s divisional vice president. Bill Luth, who was overseeing Kay, has been named Signet’s executive vice president of global store operations. Pandora has named ­Alexander Lacik, CEO of Britax Ltd., a manufacturer of child safe