How to Develop a Leadership Pipeline for Growing Companies

Three people left my last scale-up in the same quarter. All three were team leads. All three were replaced from outside, at roughly 40% more salary, and two of those external hires were gone within a year. The CEO's reaction, when I asked him about it, still rings in my ears: "We didn't have anyone ready."

That sentence is the whole problem. A growing company doesn't fail because it lacks talent. It fails because it never built a leadership pipeline — a deliberate system that turns individual contributors into managers, managers into directors, and directors into people who can run a function without being told what to do.

Below is what actually works when you're scaling, based on the mistakes I've made on my own teams and the fixes that stuck.

How to build a leadership pipeline that survives growth

Here's the hard truth: most "leadership development" at growing companies is a training budget line item that nobody owns. Someone from HR sends around a form, two people go to a conference, and everyone feels better for a quarter.

That's not a pipeline. A pipeline is a repeatable process with named owners and named successors. It has an input (who you're developing), a mechanism (how they're developed), and an output (who's ready for what, and when).

Start with critical roles, not with "leaders"

When I first tried to build this out at a 60-person company, I made the classic mistake: I asked the executive team to name their "top performers." We got twelve names. Nine of them were senior individual contributors who had zero interest in managing anyone.

Flip the order. Before you think about people, list the roles that would hurt most if they went vacant for 90 days. At a growing company, that's usually engineering leads, the head of customer success, and whoever owns your biggest account relationships. Maybe a product lead, maybe a sales manager.

At a company of 60 people, we identified 7 critical roles. At 150 people, it was 14. The number should be small enough that you can actually track it.

Define readiness levels explicitly

For each critical role, name one to three people who could plausibly step in — and label them:

• Ready now (could do it tomorrow, with support)
• Ready in 1-2 years (has the fundamentals, needs exposure)
• Long-term potential (2+ years away, high ceiling)

The catch? You will have gaps. Some critical roles will have zero names underneath. Those are your urgent priorities, and there is no point pretending otherwise.

Build a review rhythm that actually happens

Quarterly talent reviews are the engine. Ninety minutes, all executives in the room, one slide per critical role, one slide per candidate. Two questions:

1. Has this person's readiness changed since last quarter?
2. What's the single most important experience they need in the next 90 days?

The second question is what separates a real pipeline from a feel-good HR exercise. If the answer is "nothing," you have a problem.

What is the 70-20-10 rule for leadership?

The 70-20-10 rule says leadership capability comes mostly from experience: roughly 70% from on-the-job challenges, 20% from relationships (mentors, feedback, exposure to other leaders), and 10% from formal training and courses.

I'll be blunt — the ratio is a heuristic, not a law of physics. But the underlying principle is correct, and it's the one most companies ignore. HR budgets skew heavily the other way: a lot of money on courses, very little on stretch assignments.

How to actually apply it

For each person in your pipeline, design a stretch assignment before you design a training plan. That means giving them a real piece of work with real consequence:

• Own a customer segment for a quarter
• Lead a cross-functional project with people who don't report to them
• Run a hiring loop for a role they'll eventually manage
• Present at the board meeting (I've seen this work wonders for people who were "not quite ready")

Then bolt on the 20%: a mentor from outside their function, monthly. And the 10%: a short course, a coaching session, a book club. That last one is optional. The first is not.

What most growing companies get wrong: they hand out stretch assignments without removing anything from the person's plate. The assignment becomes a fifth priority, it gets dropped, and the person concludes they weren't good enough. Clear the diary before you hand over the mission.

What are the 5 C's of leadership?

The 5 C's are a widely-used framework for describing the qualities strong leaders tend to share: Competence, Communication, Collaboration, Character, and Commitment. Different versions exist — some swap in "Confidence" or "Creativity" — but the core set holds up in practice.

Here's why I use it: it gives you a shared language for feedback that isn't just "they're not ready." That phrase is useless. "Their collaboration is solid but their communication in cross-functional settings is weak" gives you something to work with.

Use the 5 C's as your readiness criteria

For each candidate on your bench, score each C from 1 to 3 against the next role's requirements, not the current role's. That last part is the trap. A brilliant engineer with excellent competence and commitment may be a poor fit for a team lead role if collaboration and communication are thin.

Dimension	What it looks like in practice	How to test it
Competence	Delivers results at the current level and above	Track record across at least two contexts
Communication	Can explain decisions to people who disagree	Ask them to lead a difficult meeting
Collaboration	Works across functions without authority	Give a project with no direct reports
Character	Does the right thing when it costs them	Observe what happens under pressure
Commitment	Invests in the company's future beyond their scope	Look at who mentors juniors without being asked

What is the 30-60-90 rule in leadership?

The 30-60-90 rule is a structured onboarding framework for someone stepping into a new leadership role. The first 30 days are for listening and learning. The next 60 days are for diagnosing and building relationships. The last 90 days are for executing and delivering visible results.

It's a solid model for external hires. For internal promotions — your pipeline's output — it needs a twist: internal candidates often skip the "listen and learn" phase because they assume they already know the place. That's where they stumble.

Design a 30-60-90 plan for every promoted leader

When someone from your pipeline takes on a bigger role, they should hand you a written plan within the first week. Yes, this is on you to require. And yes, most won't know how to write it. That's a coaching moment.

A useful plan for an internal promotion looks like this:

• Days 1-30: meet with every direct report and every key stakeholder. Explicitly ask "what would you need from me?" and "what's broken from your side?"
• Days 31-60: one decision that changes something visible. Something small but clear — a meeting that gets cancelled, a process that gets simplified.
• Days 61-90: one measurable result against a metric the team actually cares about.

When we did this properly for a newly promoted engineering lead, her team's sprint completion rate went from roughly 60% to over 80% within a quarter. When we skipped it — and we did skip it, twice — the same kind of promotion turned into six months of drift before anyone flagged it.

The trap growing companies walk into

The most common way a leadership pipeline breaks isn't through neglect. It breaks through success.

You grow from 40 to 120 people in eighteen months. Every role doubles in scope. The people you developed for one version of the company don't match the next version. And crucially, the pipeline you built for "one successor per role" suddenly looks thin, because you now have three seats where one used to exist.

The fix: build the pipeline against role categories, not individual seats. If you know that every fifty people requires one additional team lead, then your pipeline target is a rolling bench of 2-3 people ready to step up per anticipated team. You don't know exactly which seat opens when. You just know roughly how many seats you'll need.

And measure it. The metric I care most about: percentage of management roles filled from within. If it's under 50% over two years, your pipeline isn't working, no matter what the quarterly reviews say.

Where to start next quarter

You don't need a big budget or a dedicated talent function. At a company of even 30 people, here's what I'd do in the first ninety days.

1. Identify your 5-8 critical roles
2. Name one to three internal candidates for each, with a readiness label
3. Design one stretch assignment per "ready in 1-2 years" person — and clear their workload to make it real
4. Book the quarterly talent review, on a recurring calendar invite, with the executive team
5. Track two numbers: internal fill rate on management roles, and bench coverage per critical role

That's it. No program, no platform, no consultant fee. Just the discipline of looking at this once a quarter, honestly, with the people who make the hiring decisions in the room.

The CEO I mentioned at the start — the one who lost three team leads — eventually did exactly this. Two years later, three of his five most senior people had come up from inside. It wasn't because they were exceptionally gifted. It was because someone finally wrote their names down and asked, once per quarter, "what does this person need to be ready?"

That question, asked reliably enough and often enough, is the pipeline.