I learned my craft early – running my first multi-million-pound program at 26.

I was at ITT, working under Harold Geneen: a leader who built global scale through one thing – execution discipline.

No theatre. No management fashion.

Just control, clarity, and results.

When the specialists from Corporate HQ reviewed my program, they tore it apart – line by line, decision by decision. I hated it. Then I realised: they were not trying to catch me out. They were trying to stop me failing.

That was my first real education in Program Management.

And it’s the same discipline telco integrations keep relearning the hard way.

Stories don’t deliver results. Execution does.

The Original Execution Culture

Geneen had no time for management trends – least of all the word that still seduces boardrooms today: synergy.

To him, synergy was a bedtime story. A fantasy dressed up as strategy.

“Putting two tired horses together doesn’t make a racehorse,” he’d say.

You can merge balance sheets.

You can’t merge culture, priorities, or capability just by signing a deal.

Performance comes from control, not optimism.

You don’t create value by combining weaknesses and calling it strength.

Yet synergy remains the corporate equivalent of cold fusion – endlessly promised, rarely observed, and always just a few years away.

Same Illusion, New Vocabulary

Today, the language has changed.

The reality hasn’t.

Synergy is now called value creation, integration efficiency, capability uplift – pick your term.

The slides are slicker; the numbers more polished. But the self-deception is identical.

Across telecom and infrastructure, the pattern repeats.

Multi-billion-pound synergies are forecast.

Cost savings first, revenue synergies later – if ever.

On paper, the logic works. In execution, value appears only when teams earn it – not when spreadsheets predict it.

This is industry-wide. No exceptions.

For decades, Bain, KPMG and Deloitte have shown the same thing:

70% of companies overestimate synergies.

Most of the rest fall short.

And the root cause sits upstream – over-optimistic due diligence and heroic assumptions that were never pressure-tested.

Everyone calls this “integration planning.”

Those who deliver call it what it is: wishful thinking with a spreadsheet.

Hope Meets Hard Choices

Every merger begins with enthusiasm.

Every integration meets the same wall.

Systems don’t fit. Cultures clash. Accountability evaporates.

The logic that looked airtight in the boardroom disintegrates on contact with reality.

By the first steering committee, the glossy synergy slides already look dated.

The numbers still shine. But reality does not.

Technology, complexity, and culture all matter – of course they do.

But the decisive gap is something else:

Execution discipline – the kind serious operators consider non-negotiable, and which our industry has quietly allowed to fade.

Integration: A Specialist Discipline

Integration is not a line-organisation skill.

It isn’t grown naturally. It is not inherited.

It is a specialist craft – a strategy–operations hybrid where leadership under pressure matters more than theory.

Done well, the integration function disappears when the job is finished.

Done poorly, it lingers for years – a silent admission that the work never really landed.

Execution Earns, Projection Deceives

Some mergers work.

EE did – not because of synergy, but because leadership stopped talking about it and started earning it.

They turned PowerPoint into performance.

Execution is not paperwork.

It’s the grind of decisions, coordination, ownership, and pace.

And here’s the universal failure pattern:

The moment a leadership team starts believing its own projections, it stops managing.

That’s when good companies become case studies – complete with a glossy “lessons-learned” deck that explains everything – except the truth.

The Final Reality

Decades on, I still hear Geneen in my ear whenever a new merger is announced:

“You can’t merge your way to greatness. You can only manage your way there.”

Synergy isn’t created at signing.

It’s earned – painfully, deliberately – in delivery.

If there’s one lesson from every major telco integration, it’s this:

The deal doesn’t create value. Delivery does.

Everything else is projection.

About the author

David Hilliard is founder of Mentor, specialists in strategic program execution.

You can call him on 0118 359 2444 or email david.hilliard@mentoreurope.com.