The three titles get used as though they are interchangeable, and in some organisations they genuinely are. Work that sits with a Personal Assistant in one household belongs to a Chief of Staff in another. But when a brief reaches us described only as “an assistant”, the first conversation is almost always about which of the three the role actually is. They are different people, with different careers behind them, and they are not looking for the same job.
In broad terms:
- A Personal Assistant supports an individual across their personal and professional life.
- An Executive Assistant supports an executive within an organisational setting.
- A Chief of Staff coordinates priorities and delivery across the wider operation.
Most briefs sit clearly in one of the three. The ones that do not are usually worth a second look before going to market.
Understanding the Personal Assistant
A Personal Assistant typically supports an individual across both professional and private life. Diary, travel, household coordination, errands, family logistics. What tends to define the role is breadth. It follows the principal rather than the organisation, and the boundary between work and home is usually deliberate rather than accidental.
Within that there is a wide range. A Junior Personal Assistant is often in a first private household role, working to a structure someone else has set. A Private PA at the senior end may run a household’s administration, manage suppliers, and coordinate travel across several residences, holding a level of trust that takes years to build.
Senior Personal Assistants frequently coordinate other staff and outside suppliers. What they do not usually own is the support function as a whole. That tends to sit above them, whether with the principal directly or with someone appointed to hold it. If you are recruiting at this level, our guidance on how to hire a Personal Assistant sets out what to define before you start.
What an Executive Assistant does differently
An Executive Assistant is usually more corporate in scope: board-level diary management, stakeholder communications, meeting preparation, document handling. Where a Personal Assistant’s work radiates out from a person, an Executive Assistant’s radiates out from a position within an organisation.
In practice more of the role sits inside the business. An Executive Assistant may run complex diaries across time zones, lead internal projects, manage budgets, or hold relationships with the people a principal deals with regularly. The role can extend to overseeing remote teams or organising large corporate events.
The two overlap constantly, particularly for founders, where the personal and professional logistics are the same logistics. Plenty of Executive Assistants work in private or blended settings, and plenty of Personal Assistants spend most of their week on commercial matters. A brief that describes both is not confused. It just needs saying out loud, because it changes who fits. If that is the shape of your role, our page on how to hire an Executive Assistant goes into more detail.
Where a Chief of Staff sits
A Chief of Staff is not simply a more senior Executive Assistant, though on paper the two can look similar. The remit is generally broader and more operational: translating a principal’s intentions into action across an office, a household, or both.
That usually carries some authority. A Chief of Staff may oversee complex projects, manage vendors, mentor or lead a team that includes Personal Assistants and household staff, and hold responsibility for how sensitive information is handled. Where an Executive Assistant executes, a Chief of Staff is more often deciding what gets executed, by whom, and in what order.
It is not a fixed job. Some Chiefs of Staff run large support teams; others hold no direct reports at all and work almost entirely on projects and priorities. What is usually consistent is the level at which the role operates. Our page on how to hire a Chief of Staff covers how these searches tend to run.
The two questions that usually settle it
Titles vary between organisations, so the wording on a job description is not always a guide. Two questions tend to be more useful.
First, what does the role serve? A Personal Assistant serves a person. An Executive Assistant serves a person within an organisational context. A Chief of Staff serves the operation itself.
Second, does the role carry authority over other people or over how the support function works? If existing assistants would report into it, the brief is usually closer to a Chief of Staff, or to a support-function leadership role, than to an assistant position, whatever it has been called.
When the answer is more than one role
Some households and offices need two of the three, and occasionally all three. A principal with substantial commercial interests and a busy family life is often better served by a Private PA and an Executive Assistant than by one person attempting both, because the two halves rarely peak at the same time and rarely suit the same temperament.
Where a Chief of Staff is already in place, the structure tends to resolve itself. The Chief of Staff usually sets how the support function works and the assistants operate within it.
Getting the brief right
Most of the difficulty in these searches is settled before anyone is interviewed. Be clear on which of the three the role is, whether it is office-based, private or both, what authority it carries, and who the person reports to when the principal is unavailable.
Once that is defined, the search can be built around the right setting, seniority and reporting line, which makes it far easier to identify people suited to the work rather than to the job title.
Final thoughts
The right answer is rarely the most senior title available. It is the one that matches the work, the authority and the reporting lines that actually exist. Settling that at the brief stage is usually the difference between a placement that lasts and one that unravels within the year.