At Hachette Book Group, Tom Maciag, executive v-p and chief financial officer, and Gerry Cummings, senior v-p for distribution, will be retiring in the coming months. Maciag has been with the company for 25 years, and Cummings for 35 years.

As a result of their departures, Stephen Mubarek, senior v-p, finance and controller, will become senior v-p and chief financial officer, effective March 9.

Frank Casolaro, executive director, operations is rising to v-p, distribution, effective March 30.