Zach Gallagher was named chief strategy officer for the Americas at Possible.

Holly Aguirre and Heidi Singleton were named president and chief creative officer, respectively, at New Honor Society.

Jenn Johnson joined Yankee Magazine as managing editor and Mark Fleming as senior photographer.

CBS RADIO named J.D. Crowley as executive vice president of digital.

Scott Harding joined Learfield as senior director, integrated marketing.

DNA hired Dan Cabacungan as director of strategy and insights and Becca Rubin as brand strategist.

Unacast added Marianna Zaslavsky as vice president of data partnerships.

Greenlight added Todd Lancaster as creative director.

Troika hired Nuri Djavit as general manager.

MDC Partners promoted Ryan Linder to chief marketing officer in the United States.