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Chief of Staff vs COO

A COO owns operating functions and their results in their own name. A Chief of Staff works through the principal’s authority to move priorities across the whole leadership team. The right first hire depends on where work is getting stuck.

The roles side by side

	Chief of Staff	COO
Source of authority	Delegated by the principal in defined areas	Their own, over a line organization
Owns	Priorities, the operating cadence and cross-functional initiatives	Operating functions and their results
Teams	Usually few or none	Yes, often several
Scope	Across the whole leadership team, through others	The functions that report to them
Accountable for	Priorities moving without waiting on the principal	Operating performance and execution
Typical trigger	The principal is the bottleneck across functions	Operations need a permanent senior owner

The simplest test: if the role needs its own teams and budget to succeed, it is probably a COO or operations leader. If it succeeds by making the principal and the existing leaders more effective, it is a Chief of Staff.

Which to hire first

Start with where the work is getting stuck. A Chief of Staff may fit when priorities stall between established leaders. A COO may fit when operating functions need a senior leader with direct accountability for their results.

Hire a Chief of Staff first when the existing leaders own their functions but work stalls between them, and the principal is the connection point.
Hire a COO first when operations themselves are the problem, they need a permanent senior owner with authority over teams, and the principal intends to step back from running them.
Consider neither yet when one function is struggling. Hire that functional leader instead. More in when to hire a Chief of Staff.

Having both a Chief of Staff and a COO

Many organizations have both, and the roles fit together when the lines are clear. The COO runs operations. The Chief of Staff supports the principal across everything, including priorities that sit outside operations, such as fundraising, board preparation or firm-building.

The roles can overlap unhelpfully when the Chief of Staff becomes a shadow COO, directing the same teams, or when the COO sees the Chief of Staff as a layer between them and the principal. Define who owns what, and make sure the COO knows how the Chief of Staff works with the principal before the hire is announced.

Can a Chief of Staff become a COO?

Sometimes. A Chief of Staff learns the whole business and earns the trust of the leadership team, which is valuable preparation. But the jobs require different things: a COO owns teams and results in their own name, while a Chief of Staff succeeds through the principal’s authority.

If a path to an operating role is realistic, discuss it during the search. If it is not, do not imply one. Be clear about the role being offered so candidates can assess it on that basis.

In investment firms and family offices

Investment firmsA firm COO typically owns finance, operations, compliance and the firm’s infrastructure. A Chief of Staff to a managing partner carries the partner’s priorities, often coordinating fundraising processes, portfolio-related initiatives and firm operations. The role supports execution around the investment team; investment decisions and specialist responsibilities remain with the relevant professionals.
Family officesA family office COO or director of operations runs the office and its service providers. A Chief of Staff to the principal manages the principal’s priorities across family, investment and personal matters, with discretion at the center of the role.

See Family Office Search and Financial Services Executive Search.

Choose the title that matches the authority

Titles signal authority to candidates and to the organization. Calling a Chief of Staff role a COO to attract stronger candidates creates expectations of teams and ownership the role cannot meet. Calling a COO role a Chief of Staff undersells it and attracts the wrong pool. Start with what the role will own and decide, then choose the title.

Common questions

Is a Chief of Staff more senior than a COO?

No. A COO is typically one of the most senior operating executives, with teams and results of their own. A Chief of Staff often has broad influence through the principal, but less formal authority.

Can a Chief of Staff report to a COO?

Some COOs have their own Chief of Staff, which follows the same logic: the role extends the capacity of the executive it supports. A Chief of Staff to the CEO who reports through the COO usually becomes a different job.

Does a company need a COO before it needs a Chief of Staff?

There is no fixed order. Consider whether the immediate need is to carry priorities across existing leaders or to take direct responsibility for operating functions and their results.

What about a President or a Head of Business Operations?

A President usually holds broad executive authority of their own. A Head of Business Operations owns a defined operating remit. Both differ from a Chief of Staff. See Business Operations Search.

Chief of Staff, COO or something else? Start with what the role should own.

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