A Chief Operating Officer is the founder’s scale partner. They design and lead the operational engine that allows a company to grow beyond its founder. Unlike a Head of Ops, who is focused on daily execution, or a Chief of Staff, who creates leverage for the CEO, the COO owns company-wide operations — building the systems, teams, and accountability structures that turn strategy into durable, repeatable execution. They lead functional areas such as finance, people, compliance, and delivery, ensuring performance, quality, and margins improve as the business expands. A COO builds the infrastructure and leadership cadence that keeps priorities on track, managers accountable, and teams aligned. The role is most valuable in growth-stage companies that need formal operational leadership to scale sustainably — when success depends on reliable systems, strong management, and accountability frameworks that make the business run without relying on the founder’s constant oversight.