Glossary • Marketing & Business Leadership

What Is a COO (Chief Operating Officer)?

By Mark Gabrielli · Last updated: April 2026

A Chief Operating Officer (COO) is the C-suite executive responsible for a company's day-to-day operations, internal processes, and operational execution. The COO typically reports to the CEO and translates the company's strategic vision into operational reality.

COO Role and Responsibilities

Oversee day-to-day business operations across all departments
Build and optimize operational processes and systems
Manage cross-functional teams and department heads
Drive operational efficiency and cost reduction
Own OKR/KPI frameworks and performance management
Manage vendor, partner, and supplier relationships
Lead hiring, onboarding, and team scaling
Translate CEO vision into executable operational plans

COO vs. CEO

The CEO focuses on external stakeholders (investors, board, customers, market) and long-term strategic vision. The COO focuses on internal execution — making sure the company can actually deliver on the CEO's vision. In many companies, the COO is described as "running the business" while the CEO "builds the business."

When Do You Need a COO?

A dedicated COO becomes valuable when the CEO can no longer effectively manage both external strategy and internal operations. Common trigger points:

Company reaches 20-50 employees and internal coordination breaks down
CEO is too focused on operations and not enough on growth
Rapid growth is creating process and team management chaos
Preparing for a major operational expansion or acquisition

As with the CMO, many companies benefit from a fractional COO before they're ready for a full-time hire.

Related Resources

Frequently Asked Questions

What does COO stand for? +

COO stands for Chief Operating Officer. It is typically the second-highest-ranking executive in a company, responsible for translating the CEO's strategic vision into operational execution.

Does every company need a COO? +

No. Many companies — especially early-stage startups — operate without a dedicated COO, with the CEO or a VP of Operations handling operational oversight. A COO typically becomes necessary as the company scales past 20-50 employees.

What is the difference between a COO and a VP of Operations? +

The COO is a C-suite executive with board-level visibility and company-wide authority. A VP of Operations typically has a narrower scope — managing specific operational functions rather than the entire company's operations.