A Chief of Staff (CoS) is the senior operator who runs the apparatus around a principal so the principal can focus on the work only they can do. In UHNW private service, the role sits at the top of the support function: above an EA or PA, alongside or beneath a COO or Family Office Director depending on the structure.
This article gives the working definition, the typical scope, and the most important distinctions from related roles. For the deeper guide on the CoS in a family office, see The Chief of Staff in a Family Office.
A Chief of Staff manages the principal's time, decisions, and operating environment. They are not an executor of any single function. They make sure the right things happen, in the right order, with the right people, at the right time.
Three headline responsibilities sit at the centre of every Chief of Staff role.
Information flow. What reaches the principal, in what form, when. The CoS filters, summarises, and prepares. The principal sees decisions ready to make, not raw inboxes.
Decision close-out. Decisions made by the principal are translated into instructions, owners, deadlines, and follow-ups. The CoS makes sure the decisions land.
Coordination across the team. The principal often has finance, legal, household, and personal teams. The CoS holds the seams and makes sure they work together.
The exact emphasis shifts by household. Some CoS roles are heavily operational. Some are heavily strategic. All have those three core threads.
In a private office, the CoS reports directly to the principal. They sit above the EA or PA layer. They may sit alongside or above the House Manager and Estate Manager depending on structure. In a family office, the CoS may report to the principal, to a Family Office Director, or operate as the senior operator without a director above them. For more on family office structures see Private Office Team Structures at Different Stages.
The role is rarely a public title. Some CoS operate under titles like "Director of the Office," "Principal's Operator," or "Head of Private Office." The job is the same. The title is the household's preference.
The category is full of overlap. The distinctions matter when scoping a hire.
EA versus CoS. An EA executes within scope set by the principal. A CoS sets the scope, holds it, and brings the EA into the work where appropriate. An EA running a complex household without a CoS often becomes a CoS in everything but title. For the full comparison see EA vs PA vs Chief of Staff.
Family Office Director versus CoS. A Family Office Director runs the family office as an institution: governance, investment platform, legal, tax, multi-generational planning. A CoS runs the principal. Many small offices have one person doing both. As the office grows, the roles split. For more on the FOD role see What Is a Family Office Director?.
COO versus CoS. A COO runs operations with formal authority over functional teams. A CoS runs the principal's environment with influence and access. Both are senior. The lines of authority differ.
House Manager versus CoS. A House Manager runs the residence. A CoS runs the principal. In smaller setups, a senior House Manager covers some of the CoS scope informally. For the household-side comparison see House Manager vs Estate Manager vs Head of Household.
Not every UHNW household needs one. Many run effectively on a strong EA, a good House Manager, and the principal's own organising preferences.
A Chief of Staff becomes necessary when one or more of the following are true.
The principal's time is bottlenecking material decisions across multiple functions.
The team has grown to the point where coordination between finance, legal, household, philanthropy, and investment is breaking down without a single point of authority.
The principal is travelling more, splitting attention across geographies, and decisions are slowing.
The previous senior support hire has plateaued at "doing more EA work" rather than running the operating environment.
Hiring a CoS prematurely creates more friction than it solves. Hiring one too late means months of strategic decisions that did not get the attention they deserved. The right moment is the harder judgement than the role itself.
Chief of Staff compensation in 2026 in a UHNW UK setting is typically £180,000 to £320,000 base with bonus of 30% to 60% for senior roles. US ranges sit 25% to 50% above. For the deeper compensation discussion see our Family Office Salary Guide 2026.
Scope varies enormously. Three principals all employing a "Chief of Staff" can have wildly different role definitions. For more on what good scoping looks like see Common Hiring Mistakes in Private Offices.
For the full guide on the role in a family office, including how it evolves with the office and how to hire one, see The Chief of Staff in a Family Office.
To compare against the related roles see EA vs PA vs Chief of Staff.
For current vacancies see our job board. To discuss a search get in touch.
A Chief of Staff manages the principal's time, decisions, and operating environment. The role focuses on filtering information so the principal sees decisions ready to make, closing out decisions into actions and follow-ups, and coordinating across the wider team (finance, legal, household, philanthropy). They are not an executor of a single function. They make sure the right things happen at the right time across the principal's whole apparatus.
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