Andrew Langerman, a veteran collateralized debt obligation structurer, has left Deutsche Bank. A CDO market source says that Langerman left three weeks ago. Veteran Ted Meyer, a spokesman with DB, confirmed the departure but declined to comment. It could not be determined to whom Langerman reported. Brian Zeitlin, global head of CDOs, did not return calls. Calls to Langerman's residence were not returned. A CDO analyst at a rival firm says Langerman has been involved with CDOs since this market began in the mid 80s.