Andover, Mass.--B-to-b holding company CMGI Inc. has tapped David Andonian as president-COO and George McMillan as CFO. Andonian was promoted to his newly created position; previously, he was CMGI's president of corporate development. Andonian is a b-to-b marketing vet, who before joining CMGI held positions including VP-worldwide marketing and brand management of desktop systems at IBM Corp. McMillan joins CMGI from Bertelsman AG unit BMG Direct, where he was president-CEO. He will oversee CMGI's financial operations. CMGI's stock shares are trading in the low single digits, off a 52-week high of $50.25. The company's subsidiaries include Engage Inc.