OMC OMNICOM GROUP INC Management Changes 8-K Filing 2023 - Management Changes Michael J. O'Brien is stepping down as Omnicom Group's Executive Vice President, General Counsel and Secretary, and will transition to an advisory role, while Louis F. Januzzi is being promoted to Senior Vice President, General Counsel and Secretary.Get access to all SEC 8-K filings of the OMNICOM GROUP INC