Arnold Worldwide hired Elliott Seaborn as executive vice president, executive director. Most recently, Seaborn was senior vice president at Digitas.

Mike Buchner, COO of Fallon, has been appointed CEO. He succeeds Chris Foster who moves within Publicis Groupe as chairman and regional CEO of Saatchi & Saatchi Asia Pacific.

Mintz & Hoke has hired Stephanie Flynn Clason as business development coordinator.

Brainshark elevated Andy Zimmerman to chief marketing officer.

Yahav Isak joined Digitas Health as senior vice president, project management. Before joining Digitas Health, Isak served as senior vice president, operations and delivery at MRM Worldwide.

ZenithOptimedia named Brian Berg as senior vice president, director of human resources. Prior to joining the agency, Berg served as vice president of talent and organizational design at Macy's.

goodness Mfg. hired Rob Bajohr as senior art director and Neal Desai as art director.

BrightRoll hired Christine Schoultz as vice president of marketing.

NYCA hired Josh Forstot as associate creative director and digital creative technologist.

Specific Media hired Vic Catalfamo as global category lead, consumer packaged goods.