Bruker’s ex-CFO will return to the post

Bruker Corp., the Billerica maker of scientific instruments, said that its interim chief financial officer, William J. Knight, is returning to the position on a permanent basis. In June, the company named Knight, who had previously served as CFO, to the interim job after Brian Monahan took another position at the company so he could spend more time with his family. Knight also serves as the company’s chief operating officer and will continue in that role on an interim basis while Bruker searches for a replacement.