How to Hire a Fractional COO: the UK Guide

Six questions to ask, and what a strong answer sounds like

Every question here asks for something that happened, not something they believe. An operator who has genuinely held the seat answers from memory; one who has advised from the sidelines answers in the abstract, and the difference is audible within a minute.

1. Tell me about a founder you had to take out of a decision loop. What did you actually change, and what broke first?

Listen for: A strong answer names the mechanism: which decisions moved, to whom, and what rule stopped them drifting back to the founder within a month. A weak answer talks about empowerment and trust without a single named decision.

2. Walk me through the operating cadence you ran at your last company. Which meeting did you kill?

Listen for: Good COOs can recite the rhythm from memory, who owned each review, and at least one meeting they cancelled because it produced nothing. If every meeting they ever ran was apparently worth keeping, they add process but never subtract it.

3. What surprised you the last time a company you ran went from fifteen people to forty?

Listen for: Honest answers name something that failed: a first-time manager who sank, handoffs that worked at fifteen and silently stopped, information that used to travel by osmosis. Anyone who describes a smooth scale-up either was not close to it or is not telling you the truth.

4. Tell me about holding someone accountable who was close to the founder. How did it end?

Listen for: You want a specific conversation, what the person was told, and a real outcome, including an exit if that is where it went. Vague answers about difficult conversations, with no ending, mean they escalate the hard ones back to you, which defeats the seat.

5. How do you decide what comes to me and what you just handle?

Listen for: A strong candidate proposes a concrete line: spend thresholds, hiring decisions, anything customer-facing, and a weekly written summary of what they handled without you. A weak one says they will keep you in the loop on everything, which means you have hired a very expensive messenger.

6. Describe a process you inherited and deleted. What did it cost to keep and what happened when it went?

Listen for: The best operators treat process as something with a price. Listen for whether they measured the cost of the old way and checked nothing broke after removal. Candidates who only tell you about processes they installed will bury a thirty-person company in ceremony.

Red flags

Reaches for a framework by name, EOS or Scaling Up or similar, before asking how your company actually runs today.
Wants to redraw the org chart in week one, before sitting in your existing meetings and watching where work really flows.
Career built entirely inside large companies where finance, HR and IT already existed. They have run machines but never built one.
Every story ends tidily and nobody was ever upset. Most of this job is friction, and a candidate with no scar tissue has been avoiding it.

What day ninety should look like

Agree these before they start, in writing, in the brief. A fractional engagement without a ninety-day marker drifts into a retainer nobody remembers the point of.

A written operating rhythm that has been running for at least a month: named meetings, named owners, and at least one meeting cancelled because it was not earning its place.
The founder visibly out of at least three recurring decisions, each with a named owner, and no quiet drift back. Ask the team, not the COO, whether it held.
One recurring firefight traced to its cause and fixed, with a number that shows it stopped happening rather than an assurance that it did.

When a fractional COO is the wrong answer

You need someone in the building five days a week running live firefights. That is an interim or full-time COO. Two days a week of a good operator cannot hold a company that is on fire the other three.
The pain sits inside one function: pipeline chaos, finance chaos, a delivery team missing dates. Hire that seat instead. A COO layered over one broken function mostly watches it stay broken.
You are under about ten people. At that size the founder should still hold operations personally, and imported process is weight the company does not need yet. Come back at fifteen.

If one of those is you, say so in a brief anyway and we will tell you straight. Sometimes the honest answer is interim or full-time, and pointing that out costs us nothing because the operator never pays us either way.

What to put in the brief

List the specific decisions you want off your desk, by name. "Stop being the escalation point for client complaints" gets a better response than "help us scale operations".
State the decision rights up front: can they change roles, kill meetings, put someone on a performance plan without asking you first? Good COOs walk away from briefs where they would need permission for everything.
The thing founders always forget: say what must not change. Every company has one or two things, a founder-led ritual, a service promise, that look like inefficiency and are actually the business. Name them or the COO will find out by breaking one.

How to hire a fractional COO in the UK