Private security contractor Centerra Group recently acquired The Development Initiative, a de-mining company, and CEO Paul Donahue said it's not done making acquisitions. Donahue told me Wednesday he expects the Palm Beach Gardens, Florida-based Centerra Group to close on another acquisition in the fourth quarter, adding about 1,500 employees and $50 million to its top line. Centerra, which generates just under $1 billion in annual revenue, has about 600 of its 9,800 employees working in the...