Which title best describes a top-level manager who reports directly to a CEO or head of a major division?

The title that best describes a top-level manager who reports directly to a CEO or the head of a major division is "Executive." This term is typically reserved for individuals who hold high-ranking positions within an organization and often have significant authority and decision-making power. Executives are responsible for the overall strategic direction of the company and usually engage in high-level planning, resource allocation, and overseeing various departments or divisions.

In contrast, the other titles do not carry the same level of seniority or scope of responsibility. A manager usually oversees a specific team or department but does not necessarily report directly to the highest levels of leadership like the CEO. A director typically manages a larger segment and may report to an executive but does not have the same overarching authority or strategic responsibilities as an executive. A supervisor is usually focused on frontline management, directly overseeing day-to-day operations and staff at a much lower organizational level.