彼がフランス本社から先月着任した新しいＣＥＯです。

tbd

He's the new CEO from the parent company in France.

He's the new CEO who arrived last month from the French head office.

飯田太郎の後任として、大原孝一が技術部長として着任したことをお知らせいたします。

tbd

We are writing to inform you that Mr Koichi Ohara has been appointed as Manager of the Technical Department in succession to Mr Taro Iida.