How small and mid-sized companies can use the McKinsey 7S model in mergers and buy-Ins

Written by Jelica Agger Sørensen | Oct 18, 2025 7:24:09 PM

For many small and mid-sized companies, a merger or buy-in feels like a milestone. A validation that the business is strong enough to grow through partnership. Yet, what often looks like a simple transaction quickly turns into a test of leadership, culture, and clarity.

While big corporations can absorb integration pain, smaller companies can’t afford misalignment. The margin for error is thin. That’s where the McKinsey 7S Model becomes invaluable. Not as a consulting buzzword, but as a practical tool for bringing people, systems, and direction into sync during growth.

Why alignment matters more for SMEs

In large corporations, systems and processes carry the load. 
In smaller companies, alignment lives in people’s heads and habits. And when two teams come together, even subtle differences can create real tension.

  • Two different accounting systems slow everything down.
  • Two leadership styles create mixed signals.
  • Two sets of values confuse staff and customers alike.

The good news? In smaller organizations, you can see the misalignment faster and fix it more directly... if you know what to look for.

The 7S Model: A simple map for complex change


The McKinsey 7S Model outlines seven elements that shape how a company works:

  • Strategy: What you’re trying to achieve
  • Structure: How people and decisions are organized
  • Systems: The processes and tools that make things run
  • Shared Values: The beliefs that guide behavior
  • Style: Leadership and management approach
  • Staff: Your people and how you engage them
  • Skills: What you’re actually great at

When two smaller companies merge, each of these “S’s” exists in a current state (how things work today) and must evolve toward a future state (how the merged company will work tomorrow).

The goal is simple: close the gap between current and future, deliberately.

1. Strategy: Define the new Direction Together

In small companies, strategy often lives in the founder’s or CEOs head. After a merger, that clarity can vanish unless it’s made explicit.

Spend time defining what success looks like — together.

Are you merging to reach new markets, strengthen your offering, or gain financial stability?

Example: A 60-person IT consultancy merged with a 40-person cybersecurity firm. They spent their first leadership offsite crafting a single, one-sentence mission:

“We help growing businesses stay secure and scalable.”

That clarity became the compass for all decisions.

Future focus: Make the strategic story simple enough that every employee and customer can repeat it.

2. Structure: Keep It flat and clear

Smaller companies often overcomplicate structure after a merger; adding titles, reporting lines, and committees. That kills agility.

Instead, design a structure that keeps decision-making close to the work.
Decide who owns what, where collaboration happens, and how leaders stay visible.

Example: After merging, two renewable-energy startups (around 100 people total) created “pods” combining engineers, project managers, and sales staff around customer segments. It replaced hierarchy with accountability.

Future focus: Everyone should know who makes decisions, how fast, and with what authority.

3. Systems: Standardize without suffocating

Small companies run on simple tools. CRMs, spreadsheets, shared drives. When merging, system mismatch causes chaos fast.

Start by listing your mission-critical systems (finance, HR, CRM, project tracking).
Then decide which to keep, which to replace, and how to migrate data cleanly.

One mid-sized software company used a “90-day systems sprint” - one cross-functional team that standardized operations and created quick guides for all staff. It saved months of confusion.

Future focus: Choose tools that scale, but stay simple enough to support collaboration, not bureaucracy.

4. Shared values: Culture is the real deal

In smaller firms, culture is the company. It shows up in how people treat customers, handle mistakes, and celebrate wins.

After a buy-in, founders often assume values are “understood.” They rarely are.
Run workshops where both sides share what matters most (safety, innovation, reliability, autonomy) and write down the overlap.

Example: A regional solar company merging with a battery-storage start-up created three shared values: Integrity, Ingenuity, and Impact. They used them in hiring, onboarding, and team recognition.

Future focus: Culture isn’t found in posters. It’s found in everyday behavior.

 

5. Style: Lead by listening first

In SMEs, leadership style defines the atmosphere.
If one CEO leads by control and the other by collaboration, confusion spreads.

For the first three months post-merger, focus less on control and more on visibility. Hold open Q&A sessions, visit project teams, and listen to concerns before imposing new rules.

Example: When two software firms merged (about 150 staff total), both CEOs co-hosted weekly “Coffee & Context” sessions on Teams to explain integration updates and answer live questions. It built trust faster than any formal memo.

Future focus: Leadership isn’t about directing the merger — it’s about modeling the culture you want to create.

6. Staff: Keep the heart of both teams

In small companies, every person carries deep, often irreplaceable knowledge.
Losing key people means losing history, clients, or IP.

Identify early who the culture carriers are - the informal leaders, not just managers - and involve them in integration planning.
And don’t rush reorganization. People need time to understand what’s changing and where they fit.

Future focus: Retain what each side does best, and make sure every employee knows their role in the future story.

7. Skills: Build capabilities for the next chapter

After a merger, new skills are often needed. Not just technical, but interpersonal.
Teams must learn to collaborate across cultures, tools, and time zones.

Use integration as a capability-building moment.
Cross-train teams, share best practices, and pair experienced employees with new ones.

Example: After two local energy companies merged, field engineers trained office staff on project realities, while office teams taught digital workflow tools. It accelerated mutual respect and efficiency.

Future focus: The goal isn’t to blend teams. It’s to upgrade capabilities through collaboration.

Where branding fits in

In smaller organizations, the brand is personal. It’s typically the founder’s reputation, the tone of customer communication, and the consistency of experience.
After a merger, the brand becomes the external signal of whether internal alignment exists.

If your people are confused, your customers will sense it instantly.
A unified brand message - not just logo or color scheme, but the promise behind it -  shows that the organization has moved from “two companies” to “one team.”

Future focus: Treat branding as the reflection of integration, not the starting point.

From current state to future state: A CEO’s integration lens

Here’s a simplified view of how the 7S framework helps you move forward:

7S Element Current State (Today) Future State (Target) CEO Focus
Strategy Separate goals Unified direction Agree on one mission
Structure Overlap or confusion Clear roles Keep it lean
Systems Duplicates and gaps Streamlined tools Choose one per function
Shared Values Different cultures Common purpose Co-create values
Style Mixed signals Consistent tone Lead visibly
Staff Talent uncertainty Aligned roles Communicate early
Skills Gaps and silos Upgraded capabilities Cross-train teams

 

Alignment is your advantage

For small and mid-sized companies, integration isn’t about size. It’s about clarity and consistency.

You don’t need layers of consultants or complex systems to make a merger work. You need leadership that listens, structures that empower, and a shared sense of purpose.

The McKinsey 7S Model gives you a simple lens to assess where you are, where you want to go, and what needs to change to get there.

“In smaller companies, alignment isn’t a luxury. It’s survival. The moment everyone rows in the same direction, momentum takes care of the rest.”