What businesses almost never do in between is a proper examination of how the original decision was made and exactly why the first hire was unsuccessful. A failed senior appointment can often be deemed as bad luck, a personality clash, or the wrong moment in the market.
A post-mortem is worth the two hours it takes because it produces the one thing the replacement search needs, which is a brief that reflects what went wrong last time.
Why does nobody review a failed senior hire?
Because the review would have to be chaired by the people who made the appointment, and because the failure is usually explained away before anyone gets the chance to examine it.
By the time someone leaves, an account of what happened is already circulating. They were not the right cultural fit, or the timing was difficult, or they came from a bigger business and could not adapt to this one. Each of those explanations is a conclusion reached without evidence, and once it has been accepted the file closes.
Hold an exit interview and summarise it on one page
Before the person leaves, arrange an exit interview with them, ideally run by HR. Ask what they were told the job would be, when they first felt it was not working, what support they expected and did not get, and whether they raised it with anyone at the time.
Summarise the findings on a single A4 page covering the key points only, and take that page to the post-mortem meeting. It puts the departing person’s account in front of the room without anyone paraphrasing it from memory, and keeping it to one page holds the discussion on the evidence.
When should you run it, and who should be in the room?
This will depend on whether the replacement is starting right away or if there is a gap in between.
In occasions where the position is going to be left empty for a short period, three weeks after the person has left and before the replacement brief is written is the correct period to complete this exercise. Chaired by somebody who was not part of the original decision.
The first fortnight is too early. People are still handing over work, tempers are involved, and the conversation turns into a defence. The hard deadline is the replacement brief. Findings that arrive after the new specification have been signed off change nothing.
- The hiring manager
- Whoever wrote the original brief, if that was somebody else
- One or two people who worked with the appointment daily, usually a direct report and a peer
- The HR or talent lead who ran the process
- A chair from outside the decision, which can be another director, a non-executive, or your search partner
What structure should the review follow?
Reconstruct the brief exactly as it was written
Pull the original specification, the scorecard if one existed, and the email thread where it was agreed. Read the actual document rather than working from what everyone remembers agreeing.
Two findings often show up at this. Either there was no weighting attached to the criteria, or there were two versions of the requirement in circulation.
Build a dated timeline
List the dates: brief signed off, sourcing started, shortlist presented, interview rounds, offer made, acceptance, start date, first documented concern, first formal conversation about performance, notice given.
The gap you are looking for sits between the first documented concern and the first formal conversation. When that gap runs to four or five months, you are looking at a management and onboarding failure rather than a selection one, and the replacement search will not fix it.
Collect what people said at the time
Interview notes, scorecards, panel feedback, the recruiter’s written summaries. Notes written at the time beat memory.
Talk to the people who worked alongside the appointment
Twenty minutes each with three people, held individually rather than in the group. Ask when they first thought it was not working, what specifically they saw, and whether they told anyone.
Their answers usually predate the hiring manager’s by several months.
Sort every finding into one of five places
A senior hire fails in the scope, the assessment, the offer, the onboarding, or because the business changed underneath the appointment. Assign each finding to one of those, then rewrite it as a sentence describing what will be different next time. A finding that cannot be turned into that sentence is an opinion and should be dropped.
Before you write the replacement brief
We will run the review with you, put the original brief and the interview notes side by side, and turn what comes out of it into a weighted scorecard for the next search.
What do post-mortems usually find?
There are many different outcomes but the most common are:
The job was never agreed before the search began
The specification was a merge of what two or three stakeholders separately wanted, with the disagreements left in rather than settled. The person appointed delivers against one version of the role and disappoints the people holding the other.
Market evidence rarely gets near these documents. Gartner research published in February 2026, drawing on a survey of 426 CHROs, found only 31% of recruiting functions use labour market data to inform talent strategy. Most briefs are therefore written from internal opinion.
The criteria were never weighted
Doubts were raised and overridden by the calendar
The offer described a job that did not exist
Our 6F Fit Methodology exists for this reason. Fit, freedom, family, fulfilment, fortune and future are where senior appointments actually come apart, and a post-mortem will often land on one of the six.
Nobody owned the first ninety days
The business changed underneath the appointment
What do you do with the findings?
They become the weighted scorecard for the replacement search, and a standing file you can read across several hires.
One post-mortem tells you about one appointment. Four of them, filed consistently, tell you whether you have a pattern. If every senior hire brought in from outside your sector runs into trouble at roughly the same point, the problem sits in onboarding and the search brief will not resolve it.
There is another helpful exercise that costs twenty minutes when you are close to making a decision about a candidate. Daniel Kahneman revisited it in his 2021 book on flawed decision-making, as one of the few structured techniques with real evidence behind it. It asks a team to assume a decision has already failed and write down why.
Run it with the panel before the next offer goes out. It gives the person sitting on a reservation a legitimate way to put it on the table, which is exactly what the process failed to do last time.
How we can help
If a senior appointment ended early in the last year and the role is about to be re-opened, the most valuable hour available to you is the one spent working out what the original brief got wrong.
We also run our own internal post-mortem on any hire that ends early, first to establish whether anything we did contributed. Often the cause turns out to be personal to the candidate and something they chose not to raise at the time.
If you have a replacement search coming up after an appointment that did not work, book a conversation with us and we will run the review with you before the brief is written.
Hiring post-mortem FAQs
What is a hiring post-mortem?
A structured review of how a hiring decision was made, run after an appointment has ended, covering the brief, the assessment process, the offer, and the onboarding. It examines the decision rather than the individual and produces a set of specific changes to apply to the next search.
How is it different from an exit interview?
An exit interview asks a departing employee about their experience of working for you. A post-mortem examines the decision that brought them in, and the evidence around it, including the scorecard, the interview notes, and the timeline. A conversation with the person who left is one input into a post-mortem, and a valuable one, but it is not the whole exercise. Summarise the exit interview findings on one A4 page of key points and take it to the post-mortem meeting.
When is the right time to run one?
Three weeks after the person leaves, and always before the replacement brief is signed off. Earlier than that and the conversation is defensive. Later and both the people and the paperwork have started to disappear.
Who should chair it?
Somebody who was not part of the original hiring decision. A different director, a non-executive, or your search partner. A panel reviewing its own appointment will produce an account of why the decision was reasonable at the time, which is a different document to the one you need.