The managing director of an important subsidiary leaves unexpectedly. Filling the role will take months. In the meantime, the strategy must be executed, the numbers must add up, and the team needs leadership. The options are limited: throw an internal candidate in at the deep end too early, leave the position vacant, or engage an interim manager.
Interim management is not a stopgap. Used correctly, it delivers results; used incorrectly, it creates dependencies that are more expensive than the vacancy it was meant to bridge.
A managing director I have advised had used three interim managers for the same position in two years. Each delivered good work; each left when the engagement ended. And each left behind an organisation that was a little less self-sufficient than before. “We always had an interim manager. But we never had a successor,” he summed up the problem. Interim management had become a permanent solution—without anyone having consciously made that decision.
This is not an argument against interim management. It is an argument for using it deliberately and strategically. Three levers make the difference between an engagement that leaves the organisation stronger and one that merely treats symptoms.
Not every vacancy justifies an interim manager. And not every interim manager fits every situation. The most common wrong decision is to bring in an interim manager without clarifying what problem they are actually meant to solve.
In practice, there are five typical deployment scenarios, and each requires a different profile and a different engagement. First, the classic bridge: a position is vacant and recruitment is underway. The interim manager keeps operations running without setting strategic direction. Second, the targeted change engagement: a transformation, a restructuring, a turnaround requires a capability that is not available internally. The interim manager brings expertise and independence that an internal candidate cannot have. Third, the knowledge bridge: a new business area, a new technology, a new regulation requires foundational know-how that the organisation must develop itself—but not without external guidance. Fourth, the honest diagnosis: when a division has structural problems that can no longer be analysed objectively internally, an interim manager’s outside perspective creates the basis for the right decisions. And fifth, the time-limited programme: a leadership task must be taken on that will not continue after completion—for example implementing a regulatory requirement, setting up a special unit, or leading a major programme. The interim manager is accountable for a defined initiative whose end coincides with the engagement.
| Deployment scenario | Profile | Engagement focus |
|---|---|---|
| Bridge | Solid generalist experience, not a change driver | Stability, day-to-day operations, orderly handover |
| Change engagement | Specialist expertise with change capability | Defined transformation within a defined timeframe |
| Knowledge bridge | Subject-matter depth plus teaching skills | Building internal capability, knowledge transfer |
| Diagnosis | Experienced senior advisors with leadership experience | Analysis, recommendation, if applicable initial implementation steps |
| Time-limited topic | Programme or project leadership experience with strong leadership skills | Setting up or delivering a temporary special assignment |
If you staff a change engagement with a bridge profile, you will get stability where change was needed. If you award a pure diagnostic engagement to a turnaround specialist, you will reap activism before the real problem has been understood. Clarifying the profile question before the engagement is advertised is the most important preparatory work.
An interim manager also brings a structural advantage: they are not pursuing an internal career. This allows them to speak uncomfortable truths and make decisions that internal managers would hold back to protect their own standing. This political independence is particularly valuable in change and diagnostic engagements, where internal loyalties make honest analysis more difficult.
A division head I supported in managing an interim manager had set up the engagement cleanly: a twelve-month term, an agreed daily rate, monthly reviews. What was missing was a precise definition of outcomes. In month six, she faced the question of whether the engagement needed to be extended. Operational stabilisation was on track, but the strategic realignment had not made tangible progress. The interim manager had worked on what he could, in the absence of clear priorities. Only renegotiating the engagement with specific milestones delivered the desired success.
A professional interim engagement needs three elements. First, a defined outcome: what must be achieved by the end of the engagement? Not “lead the department,” but specifically: “Three key positions filled, the restructuring plan implemented, the successor onboarded.” If you cannot name the outcome, you will not achieve it. Second, clear authorities: what may the interim manager decide, and what not? Which investments, hires, terminations fall within the engagement? Without this clarity, they either waste time on alignment or overstep their authority—both are damaging. Third, a defined timeline with a handover plan: when does the engagement end? Who takes over? How will knowledge be secured? An interim manager working without a handover perspective cannot do otherwise than make themselves indispensable.
David Maister, the thought leader in professional services, coined a principle that also applies to interim management: the best advisor or interim manager is the one who makes themselves redundant. Anyone who remains tied in for the long term has either not fulfilled the engagement or has led the organisation into a dependency that was not intended.
This has direct implications for contract design. If you define an engagement solely by daily rate and term, you are buying availability, not outcomes. Instead, anchor milestones in the contract. An interim engagement is not a permanent employment relationship billed by invoice; it is a project with a clearly defined goal and a clearly defined end.
The greatest value of an interim engagement is created not during the engagement, but in the months afterwards. If the improvements the interim manager achieved erode again after they leave, the engagement was a temporary success without lasting impact. This observation aligns with what is seen in numerous consulting engagements: lasting impact is decided in the handover, not in the work itself.
Embedding does not begin at the end, but at the beginning. For engagements with a line successor, the question is: who will take over after the interim manager? This must be answered at the start of the engagement, not two weeks before it ends. If succession is still unclear, the interim manager should be actively involved in the selection, because they know the role’s requirements from first-hand experience better than any HR department or recruitment consultancy. And the handover period must be generously planned: four weeks of parallel running is not a luxury, but a prerequisite for implicit knowledge to actually be transferred—not just binders. For time-limited programmes without a successor, the question is different: into which existing line structures will the results be transferred, and who will be responsible for ongoing support after the engagement ends? Here, too, the answer must be clear at the beginning, not improvised at the end.
Equally important is embedding the changes in the line organisation. The processes, structures, and decision-making paths introduced by the interim manager must be carried by internal managers. If the changes depend solely on the interim manager, they will collapse with them. This embedding requires deliberate support: regular reviews after the engagement ends, clear accountabilities in the line, and management’s willingness to stand behind the decisions made. Reality in companies shows: interim engagements rarely fail because of the interim managers. They fail because the organisation is not willing to take responsibility itself after the engagement ends.
First: If you are currently working with an interim manager, can you state the agreed outcome and the end date in two sentences? If not, the engagement is defined too vaguely.
Second: What happens after the engagement ends? For a line role: who will take over the position, and has this person already been identified? For a time-limited programme: into which structures will the results be transferred? If your answer is “we’ll clarify that later,” you are creating a follow-on problem.
Third: Which changes introduced by the interim manager would survive their departure without further support? Name them specifically. Anything not on the list must be actively embedded before the engagement ends.
Interim management is one of the most effective tools available to managers—and one of the most frequently misunderstood. If you use interim managers as gap-fillers, you get expensive gap-fillers. If you use them as a strategic tool, with a clear engagement, a defined timeline, and serious embedding, you get sustainable results.
The difference is not the interim manager. It lies with the manager who awards and steers the engagement.
When advisors help – The strategic decision of when external support makes sense and how to choose it correctly.
The difficult legacy – When the interim manager takes over a mess: the first 90 days.
All Insights can be found in the overview.
Proven tools and models for self-application are available under Solutions.
If you want to take these thoughts further for your company, a no-obligation initial conversation is worthwhile.
