Post Holdings Chief Operating Officer Jeff Zadoks Announces Retirement Post Consumer Brands President and CEO Nicolas Catoggio to Add Post Holdings COO Responsibilities upon Zadoks' RetirementST. LOUIS, Aug. 7, 2025 /PRNewswire/ -- Post Holdings, Inc. (NYSE: POST), a consumer packaged goods holding company, today shared that Jeff Zadoks, EVP and Chief Operating Officer, has announced his retirement effective January 2026. Upon Zadoks' retirement, Post Consumer Brands President and Chief Executive Officer N ...