Little, Brown and Company publisher Michael Pietsch will be the new CEO at Hachette Book Group after April 1st. Pietsch will lead the search for his own replacement after 11 years at the helm of Little, Brown, a division of Hachette Book Group.

After seven years as CEO, David Young will step down next year. Back in the UK, Young will assume the role of deputy chief executive of Hachette UK and CEO of Orion Publishing Group. Starting in June 2013, he will replace retiring Peter Roche in those roles.

Here’s more about the leadership changes, from the official memo: “Effective immediately, Ken Michaels, HBG’s Chief Operating Officer, is promoted to President and Chief Operating Officer … David Young will also chair Hachette Livre’s Chief Operating Officers’ council, covering France, UK, USA and Spain, to help all parts of Hachette Livre benefit from his understanding of the publishing processes, systems, and efficiency.”

Young explained in an official statement: “I am returning to the UK because I miss my wife and children too much: I shall also miss all of my great colleagues at HBG and working in the U.S., but family comes first.”