Skills can be trained; fit cannot. The four dimensions that decide whether an executive assistant is right for you, and the one question to ask for each.
To find the right executive assistant, assess the person, not just the CV. The strongest EA relationships rest on four things that rarely show up on a résumé: communication style, working rhythm, decision-making autonomy, and how the assistant’s strengths map to what you actually need delegated. DonnaPro matches each founder to an assistant across more than 50 data points covering exactly these dimensions, and 91% of clients stay beyond the first 60 days. Skills can be trained. Fit is what makes the partnership last.
Most founders who come to us already know they need help. What stops them is a quieter fear, and it is the question we hear most often on sales calls: what if I do not like the person you pick? It is a fair worry. This is why DonnaPro matches every client to an assistant across more than 50 data points before day one.
The stakes are high because the time at risk is real. Asana’s Anatomy of Work Index, a survey of more than 10,000 office professionals across markets including the UK, found that even the C-suite lose 60% of the working day to “work about work” (opens in a new tab): the coordination, status updates, and chasing that surround real output rather than the output itself. A good executive assistant is the lever that claws that time back. A poorly matched one quietly wastes it.
And the risk is almost never about competence. When a hire falls short, it is usually about fit, not skills. In a 2024 survey of US and UK employers by General Assembly (opens in a new tab), 49% of executives named a lack of soft skills as a top reason entry-level hires seem unprepared, far more than pointed to a gap in technical ability. For a role as personal as an executive assistant, the pattern is sharper still: the classic mistake is to screen hard for skillset and leave fit to chance, then watch a strong-on-paper assistant drift away within months because the working-style fit was wrong.
So this guide does one job. It gives you a framework to assess a person, not a firm. Whether you are checking that your current assistant is the right long-term fit, or evaluating someone a provider has just matched you with, the four dimensions below are what to look at and the questions to ask. Choosing which agency to work with is a separate decision, covered in our guide to choosing an executive assistant agency. This is about the human on the other side of the relationship.
Most executive assistant relationships that break down do so because the person was wrong for the founder, not because the person was bad at the job. This is counterintuitive, because competence is the thing we screen for hardest and the thing that is easiest to put on a CV. Fit is harder to see, so it gets skipped, and then it is the thing that quietly ends the relationship.
The mechanism is simple. An executive assistant sits closer to how you work than almost anyone else in your business. They see your inbox, your calendar, your half-formed decisions, and your worst days. If their instinct is to wait for instructions and yours is to hand over a problem and expect it solved, every week produces friction. If you think out loud and they need everything in writing, you will both feel it. None of that is a competence gap. It is a working-style gap, and no amount of skill closes it.
This matters more for a founder than for almost any other kind of hire. A department head can be excellent and still keep you at arm’s length. An executive assistant cannot. The value of the role comes from proximity and anticipation, from someone who knows what you need before you ask. That only works when the two of you fit, which is why assessing fit deliberately is not a soft extra. It is the core of the decision.
There is one more reason fit is worth naming out loud. When an arrangement does fail, the instinct is to blame the assistant and start again. Often the real issue was a mismatch that better assessment would have caught at the start, or a setup the founder never got right. Either way, starting over with a new person and the same blind spot repeats the problem. Assessing fit properly, once, is cheaper than hiring twice.
Four dimensions decide fit, and together they tell you more than a decade of experience on a CV:
The first three are about how the person works. The fourth is about whether what they are good at matches what you actually need done.
You can assess all four whether you are evaluating a brand-new match or pressure-testing an assistant you already have. For a new match, they are questions to ask and signals to watch for in the first conversations. For an existing relationship, they are a diagnostic: if something feels off but you cannot name it, the problem usually lives in one of these four. Each section below gives you what good looks like and one direct question to ask.
The right communication fit is the one that matches how you naturally take in and give information, not the one that looks most professional. This is the dimension founders underestimate most, because every assistant communicates competently in an interview. The question is not whether they communicate well. It is whether they communicate the way you do.
Start with how you prefer to be updated. Some founders want a single written summary at the end of the day and nothing in between. Others want a quick voice note the moment something changes. An assistant who sends you long daily reports when you wanted headlines will feel like noise, however good the reports are. Watch, too, for channel fit. If you live in WhatsApp and Telegram voice notes and the assistant defaults to formal email, you will feel the drag every day.
The more revealing test is how they handle ambiguity. A founder rarely hands over a clean brief. The real question is what the assistant does with a vague one. Do they come back with three sharp clarifying questions, or do they either freeze or guess? The best assistants ask early and ask well, then stop asking once they understand you. That instinct to surface the right question at the right moment is what separates someone you can hand a mess to from someone you have to spell everything out for.
What good looks like:
The question to ask: “When I give you something half-formed and unclear, walk me through what you would do next.” The answer tells you whether they fill gaps with questions or with assumptions.
Working rhythm is about whether the assistant’s pace and hours line up with yours, especially when the week gets hard. Two people can both be diligent and still be out of sync, and that mismatch shows up exactly when you can least afford it.
The practical layer is hours overlap. If you run on GMT and need someone reachable through your morning, an assistant whose core hours barely touch yours will always be a step behind. For UK founders this is one of the strongest arguments for a European assistant over an offshore one: DonnaPro assistants work CET and GMT business hours, so your morning preparation and your end-of-day follow-ups both fall inside one shared working day rather than being handed off overnight. Timezone overlap is not a detail. It is often the difference between an assistant who clears things while you sleep in the wrong direction and one who works alongside you.
The deeper layer is pace and reliability under pressure. Every founder has peak-stress periods: a fundraise, a launch, a board week. A well-matched assistant reads those moments and shifts gear without being told, tightening updates and getting ahead of what is coming. A poorly matched one keeps the same steady pace while your week is on fire. When you assess rhythm, do not just ask about a normal day. Ask what they do when everything lands at once.
Also worth checking is sync versus async balance. Some founders want a weekly call and otherwise silence. Others need a quick daily touchpoint to feel the relationship is alive. Neither is wrong, but a mismatch here erodes trust slowly. The strongest arrangements still include at least one real conversation a week, because messages alone rarely build the deeper understanding the role depends on.
What good looks like:
The question to ask: “Tell me about a time a client’s week went sideways. What did you change about how you worked?” You are listening for whether they adapt to pressure or just absorb it.
The best executive assistants own outcomes rather than wait for instructions, and this is the dimension that most separates a true right hand from a task-taker. It is also the hardest to train, which is why you assess for it rather than assume it will develop.
The distinction to look for is between someone who completes tasks and someone who manages outcomes. A task-taker does exactly what you asked and stops. An owner takes the goal, works out the steps, handles the ones they can, and comes back only with the decisions that genuinely need you. The difference compounds. In the first case you are still the project manager. In the second, you have actually handed something off.
Judgement under ambiguity is the real test of ownership, because most of what reaches an assistant’s desk arrives without a clear right answer. You are not looking for someone who always makes the call you would have made. You are looking for someone whose instinct is sound, who knows which decisions are theirs and which are yours, and who can explain their reasoning when you ask. An assistant with good judgement and the confidence to use it saves you far more time than one who is technically flawless but checks in on everything.
The mindset behind this is ownership, and you can hear it in how people talk about past work. Owners talk about problems they noticed and fixed before anyone asked. Task-takers talk about instructions they followed well. Both can be valuable, but only one gives a busy founder genuine leverage. If you want someone who functions as a thought partner rather than an inbox, this is the dimension to weight most heavily.
What good looks like:
The question to ask: “Tell me about something you changed or fixed for a previous executive without being asked.” Silence here, or a scramble for an example, tells you they wait to be told.
Expertise fit is about matching what the assistant is strongest at to what you most need delegated, rather than hiring the most impressive generalist and hoping it lines up. The other three dimensions are about how someone works. This one is about what they are for.
Start from your side, not theirs. Before you assess anyone, write down the work that actually drains your week. For most founders it clusters in a few places: inbox and calendar, meeting preparation, travel, research and decision support, project follow-through, and personal admin. Our guide to what an executive assistant actually does works as a checklist if you would rather start from a list than from memory. The point of the list is to see where your real weight sits, because that is what the assistant’s strengths need to cover. An assistant who is brilliant at research is wasted if what is drowning you is scheduling.
Then ask where a generalist is right and where you need an edge. For the majority of founders, a strong generalist executive assistant is exactly right, because the work an EA does is broadly the same whether you run a fintech or a construction group: protecting a calendar, managing an inbox, preparing for meetings, chasing follow-ups. Deep industry knowledge is rarely the deciding factor. What matters far more is that they understand how a business runs well enough to anticipate, rather than that they already know your sector. Be wary of over-indexing on industry experience at the expense of the first three dimensions.
There are exceptions. If a specific, recurring task sits at the centre of what you need, such as heavy investor relations, complex multi-timezone travel, or constant CRM and data work, then it is fair to weight demonstrated strength in that area. The test is simple: is this a core, repeating part of the role, or a nice-to-have you are using to rank candidates? Weight it only if it is the former.
What good looks like:
The question to ask: “Here are the three things that eat most of my week. Which of these are you strongest at, and which would you lean on support for?” Honesty about the second half is a good sign.
Fit is a judgement you can only make properly once the two of you are actually working together.
Run the assessment as a short, deliberate sequence rather than a single gut-feel interview, and use the same sequence whether you are evaluating a new match or checking an existing one. Gut instinct is exactly what leads founders to hire the person they liked over coffee and regret it three months later. A light structure protects you from that.
Use these steps in order:
If you are assessing an assistant you already have, the same five steps work as a diagnostic. When something feels off but you cannot name it, walk through the four dimensions and you will usually find the mismatch in one of them. Sometimes the fix is a conversation about communication cadence or decision boundaries, not a replacement. The point of assessing fit deliberately is to tell the difference between a relationship that needs tuning and one that was never going to work.
This is also why a trial period matters so much, and why DonnaPro structures every engagement with a 60-day commitment-free window. Fit is a judgement you can only make properly once you have worked together, so the arrangement should let you make it without being locked in.
DonnaPro is built around the idea that fit is the hard part, so matching is the core of the service rather than an afterthought. The four dimensions above are not just advice we give founders. They are the dimensions we assess against before anyone is placed.
The matching itself draws on more than 50 data points covering communication style, working rhythm, decision-making approach, and the nature of the work being delegated. During a 9-day onboarding, the team learns how a new client works and researches their business, then pairs them with an assistant whose profile complements it. The assistant arrives on day one already briefed, rather than starting from a blank page. This is the opposite of a marketplace, where you are handed profiles and left to guess at fit yourself.
The assistants themselves come through a 30-day, six-stage selection process the company calls HR Time Vault™, which accepts roughly the top 1% of EU applicants. It screens as much for how someone thinks, their judgement and ownership instinct, as for what they have done, because those are the qualities that cannot be trained later. Every assistant then completes 14 days of structured training before any client work begins. The dimensions hardest to fix, the ones this guide tells you to assess for, are the ones the selection process is designed around.
Fit also does not rest on one person. Every DonnaPro assistant is backed by a dedicated account manager and a quality manager, so the standard of the work and the health of the relationship are watched by more than the individual. If something in the match needs adjusting, there is a structure to catch it early rather than a founder quietly growing frustrated.
And because fit can only truly be judged by working together, every dedicated executive assistant engagement starts with a 60-day commitment-free window, with dedicated support available from £2,350 per month. The assistant is working with the client within nine days of signup. The result of matching this way shows in one number: 91% of clients stay beyond that first 60 days.
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Checked for accuracy against how DonnaPro actually works before publication.
This guide draws on three kinds of evidence. The first is DonnaPro's own matching data from real engagements, including the 50-plus data points used in pairing and the 91% retention figure beyond the 60-day trial. The second is published research on how executives spend their time and why senior hires succeed or fail. The third is the pattern we hear directly on founder sales calls, where personality mismatch, not weak skills, is the most commonly named reason an assistant relationship breaks down. Figures and claims change over time, so treat the external statistics as of their publication dates and verify current details before relying on them.
Sources reviewed
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