M Integration: The Deal Is Won or Lost in the First 100 Days

The purchase agreement is signed in a single afternoon. The next morning, the work of merging two financial administrations, two payroll systems, two IT environments, and two cultures should begin—all while the daily operations of both companies continue as usual.

When two companies with revenues of 20–50 million merge, neither has a dedicated integration team: the same people manage the day-to-day operations and handle the integration on top of that. When an integration stalls, the reason is usually the same: everyone is involved, but no one is accountable.

What does post-merger integration mean?

Post-merger integration refers to the process of combining the acquired company with the buyer after the deal is closed: including financial administration, personnel, systems, customer relationships, and branding. Integration is planned before the deal is finalized, and its first stages are executed through a roughly 100-day plan. In English, this is known as post-merger integration.

Who Is Responsible for What?

AreaWhat to IntegrateWho Is ResponsibleCherry Resource
FinanceReporting, chart of accounts, cash management, group structureChief Financial OfficerInterim CFO →
PeoplePayroll, employment terms, organization, potential change negotiationsHR DirectorInterim HR →
IT and SystemsERP, security, users, licensesChief Technology OfficerInterim CTO →
Customers and SalesCustomer communications, pricing, sales teamsSales DirectorInterim Sales Director →
BrandName, visual identity, communicationsMarketing DirectorInterim Marketing Director →
OverallTimeline, dependencies, reporting to ownerIntegration DirectorCherry Operating Partner →

What is included in a 100-day integration plan?

PhaseTimingObjective
Before Closing30 days beforeIntegration director has been appointed, Day 1 communications are ready, and critical dependencies have been identified
Day 1ClosingEmployees, customers, and suppliers know what will change and what will not
StabilizationDays 2–40Payments, payroll, and reporting are functioning, and key personnel are retained
IntegrationDays 31–90Organization, process, and system decisions have been made, and implementation is underway
Value CreationDay 90 onwardProjected savings and revenue synergies are measurable and have been reported to the owner

Why Bring in an External Integration Director?

Your own executives manage integration alongside their day jobs, and few have experience from previous integrations. An external interim executive has done this before. They belong to neither company’s camp, and their objective is agreed in advance: complete the integration and hand over.

Read: The Value Creation Plan Is Ready—But Who Has Time to Execute It? →

How an Integration Manager Gets Started

Tell us about your situation

We will go through it in about half an hour. The assessment is free of charge and does not commit you to anything.

Proposal in 48 hours

You'll typically receive 2–4 carefully selected candidates with justifications within 48 hours. Not a long list of "just-okay" names.

The work starts

You meet the candidates and decide for yourself. A start is possible as early as next week.

Frequently Asked Questions

At this scale, there’s typically no dedicated integration team. The options are your own manager on top of their day job, or an external interim integration manager who does only this and reports to the buyer’s management or owner.

Ideally about a month before the deal closes. That way day-1 communications, payment flows, and payroll are secured before anyone notices anything.

The duration is agreed upon according to the situation and can be extended or shortened. The assignment can be full-time or part-time.

You only pay for days worked, and billing occurs once a month. The price depends on the complexity of the task and the workload. We will provide this after a free assessment. What does the cost consist of →

Deal Approaching? Appoint an Integration Lead Before Day 1.

A free assessment takes about half an hour. After that, you will know what kind of expert suits your situation, when they can start, and what it will cost.

In a hurry? Call any of us directly.

Are you an interim manager yourself? Apply for the Cherry Pool →