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John Tzitzikalakis, CPA, currently serves as the Acquisition Planning Project Manager at Omnicom, where involvement in M&A accounting integration is pivotal for the Omnicom–Interpublic Group merger. Previously, John held the position of Global Controller at DDB, overseeing financial reporting for over 40 international reporting locations and providing guidance on complex accounting matters. John's extensive experience includes leadership roles at McCann Worldgroup, where responsibilities encompassed financial reporting and FP&A functions for multiple agencies, as well as managing corporate finance teams. John has effectively led financial operations across various organizations, including Seven Worldwide and Motorcar Parts of America, and has significant experience in audit management from early career roles at EisnerAmper and CBIZ Marks Paneth.