The chief operating officer role has changed substantially over the past two decades. What was once primarily a function of internal execution, covering process management, departmental oversight, and the day-to-day mechanics of running the business, has expanded into a broader strategic mandate that often overlaps with functions previously owned by the CEO.
Understanding how and why the role has evolved matters for two reasons. First, it changes what to look for when hiring a COO or evaluating a fractional COO engagement. Second, it clarifies what the role should and should not be responsible for in a modern organization, which prevents the ambiguity that most COO hiring failures stem from.
What the Traditional COO Role Was
The COO role emerged in large organizations as a counterpart to the CEO: the CEO sets direction, the COO executes it. In that original model, the COO’s function was primarily operational. They managed the departments, oversaw production or service delivery, handled the day-to-day complexity of running the business, and reported on operational performance to the CEO and board.
This model worked well in vertically integrated, stable businesses where the core challenge was execution at scale. Manufacturing, logistics, financial services, and large retail organizations built their COO functions around this execution-focused model, and it produced measurable value.
The underlying assumption was a clean division: the CEO thinks, the COO runs. In practice, this separation was always imperfect. COOs with operational depth naturally developed strategic perspectives, and CEOs found themselves relying on their COOs not just for execution but for judgment on complex decisions.
What Changed
Several forces reshaped the COO role over the past two decades, and most of them have accelerated rather than slowed.
The pace of change increased. When business environments change slowly, execution is the primary challenge. When they change rapidly, the ability to adapt the operating model becomes as important as running it efficiently. COOs became responsible not just for maintaining operational performance but for rebuilding it as strategy shifted.
Organizational structures flattened. The rise of agile methodologies, cross-functional teams, and distributed organizations reduced the hierarchy that traditional COOs managed. Modern COOs increasingly coordinate across functions rather than managing a vertical stack of departments. The skill set shifted from hierarchical management to cross-functional alignment.
The CEO role expanded. As external demands on CEOs grew, including investor relations, strategic partnerships, public visibility, and board management, more CEOs needed COOs who could operate with full strategic authority inside the business while the CEO’s attention was directed outward. This elevated the COO function from execution manager to de facto internal CEO.
Technology changed what operations meant. In many businesses, operations are now primarily digital. The systems the company runs on, the data infrastructure, the automation of previously manual processes. These became core operational responsibilities that were not part of the traditional COO model. COOs needed to develop fluency in technology strategy, not just operational management.
Small businesses grew into the role. As more businesses scaled into the $5M to $50M revenue range, a tier of operational complexity emerged that needed executive-level attention but had previously been managed by founders alone. The fractional COO model emerged from this gap, bringing with it a broader understanding of what COO-level work looks like outside enterprise organizations.
What the Modern COO Actually Does
The modern COO role is more accurately described as an operating system architect than an execution manager. The function is not just to run what exists, but to design, build, and continuously improve the systems the business runs on.
Strategy translation. The CEO or leadership team sets strategic direction. The COO translates that direction into operational decisions: what needs to be built, what needs to change, what resources are required, and in what sequence. This translation work is not mechanical. It requires judgment about feasibility, tradeoffs, and organizational capacity.
Cross-functional integration. Modern organizations break work into functional domains (sales, marketing, product, finance, operations) that create natural silos. The COO is responsible for the coordination layer: ensuring that functions work toward shared outcomes rather than optimizing their own metrics at the expense of the whole.
Organizational capability building. The COO builds the people, process, and technology infrastructure that determines what the business can do. Hiring frameworks, performance management systems, technology platforms, training programs, and standard operating procedures are all COO-domain decisions that determine organizational capability over time.
Operational risk management. As organizations become more complex, operational risk grows. Supply chain dependencies, technology failures, regulatory exposure, and key-person concentration. The COO’s role includes identifying and managing these risks before they produce operational failures.
Executive team coordination. In many organizations, the COO serves as a chief of staff to the leadership team, ensuring alignment, managing the cadence of leadership discussions, translating decisions into action, and maintaining accountability for cross-functional commitments.
The COO in Small and Mid-Market Businesses
The COO function looks different at a 20-person company than at a 2,000-person company, but the underlying need is the same: someone with executive-level judgment needs to own how the business runs.
In small businesses, the COO is typically the first executive hire after the founding team, brought in specifically because the founder is at capacity managing operations while also trying to grow the business. The role in this context is often foundational: building the processes, systems, and team structures that did not need to exist formally when the company was smaller.
The most common areas where small business COOs focus their first 12 months:
Documenting and standardizing the core delivery process to be executed consistently without founder involvement at every step.
Building the metrics infrastructure to give leadership visibility into how the business is performing operationally, not just financially.
Establishing accountability structures that define who owns what and how decisions get made as the team grows beyond the founder’s direct span of control.
Addressing vendor and partner relationships that have not been actively managed and represent both cost and risk.
Designing the hiring and onboarding infrastructure that will allow the company to add people without degrading quality or culture.
Implications for Hiring or Engaging a COO
The evolution of the role has practical implications for how businesses should evaluate COO candidates or fractional COO engagements.
A COO whose background is primarily operational management in a stable, large-company context may not be the right fit for a growing small business that needs an architect, not a manager. The skills required to maintain an existing operation differ from those required to build one.
Ask specifically about experience building operational infrastructure from an early stage: what did the company look like when they arrived, what did they build, and what was the outcome? Candidates who can describe concrete infrastructure-building work, rather than just operational oversight, are more likely to be effective in a growth-stage context.
The reporting relationship matters. A COO who operates effectively as the internal CEO equivalent, with full authority to make operational decisions and direct the leadership team’s execution agenda, produces different results than a COO who operates as a department head coordinating across functions. Clarifying the authority the role actually has before hiring prevents the ambiguity that most COO disappointments stem from.
Frequently Asked Questions
How has the COO role changed?
The COO role has evolved from a primarily execution-focused function (managing departments, overseeing delivery) to a broader strategic role encompassing strategy translation, cross-functional integration, organizational capability development, and operational risk management. The driver of this evolution is the increasing complexity and pace of change in business environments, which requires the COO to be an architect of operating systems, not just a manager of existing ones.
What does a modern COO do?
A modern COO translates strategic direction into operational execution, integrates across functional departments to prevent silos, builds the people, processes, and technology infrastructure the business runs on, manages operational risk, and often serves as a chief of staff to the leadership team. In smaller organizations, the COO is often responsible for building these systems from scratch rather than maintaining existing ones.
Is the COO role still relevant?
Yes. The COO function is arguably more relevant in complex, fast-changing business environments than it was in the stable execution-focused organizations where the role originated. The nature of the work has changed, but the underlying need, which is executive-level judgment applied to how the business runs, remains a consistent requirement in organizations of meaningful scale and complexity.
What is the relationship between the CEO and COO?
The traditional model is that the CEO sets direction, and the COO executes. The modern reality is often more collaborative: the COO provides operational grounding for strategic decisions, translates strategy into execution plans, and manages the internal organization while the CEO focuses on external priorities. In many organizations, the COO functions as the internal CEO, with full authority over the operational side of the business.
Evaluate Whether Your Business Needs COO-Level Leadership
If your business is experiencing operational strain, founder capacity constraints, or execution gaps that are limiting growth, the question to answer is whether the gap calls for COO-level leadership or a different type of intervention.
World Consulting Group works with small and mid-market businesses on operational assessments and fractional COO engagements. The starting point is a direct evaluation of the operational gaps and the level of leadership required to close them.
Related reading:
– What Is a Chief Operating Officer
– COO vs Director of Operations: Which Role Does Your Business Need
– Benefits of Hiring a Fractional COO
*Published by World Consulting Group. World Consulting Group provides operations, leadership, and growth advisory for small and mid-market businesses.*
