Keith Brown, former chief operating officer of Breitling U.S.A., has joined the Marketing Management Group Inc. (MMG). Prior to his tenure with Breitling, Brown worked with the Swatch Group.

Nissay (Sy) Hak joined Shreve, Crump & Low as manager of corporate sales. Prior to joining Shreve’s, Hak served as lead sales manager and regional account coordinator for the Cambridge, Mass., office of EF Education.

Rideau Recognition Solutions announced the appointment of Ralph Destino, chairman emeritus of Cartier Inc., as chairman of Rideau’s board of directors. Destino started his career with Cartier Inc. 30 years ago and served as the company’s president for the Far East division, as well as president and chairman.

Maui Divers Jewelry has named Laura Kino as e-commerce manager, responsible for directing, establishing, planning and implementing the overall policies and goals for the company’s marketing strategy on the Web. She also will manage the Internet development team.

Kathy Jernigan and Denise Piccirello were named leasing representatives at Sterling Jewelers Inc. Jernigan is a graduate of the University of Akron and a member of the International Council of Shopping Centers. Piccirello has a Fashion Merchandising degree from Virginia Marti College of Fashion and Art.