Succession Planning When Every Critical Role Rests on One Person

Most succession plans in growing companies fail for a reason that has nothing to do with talent. They ask the question "who will replace this person?" in organizations where every critical role depends on one individual and there is nobody behind them. Naming a successor in that situation produces a name in a box and no real protection. The work that actually reduces the risk comes first: reducing how much of each critical role lives only inside the person who holds it, so that someone, internal or external, could step into it at all.

We are asked about succession most often after a scare. A key person falls ill, resigns or announces a move, and the leadership team discovers in a week how much of the company was running through them. The succession plan, if there is one, turns out to be a spreadsheet that nobody has tested.

"We had a name in a box"

A family-owned industrial company in the Eastern Province had employed the same finance manager for nineteen years. He held the relationships with the company's banks, knew how the accounts of its three legal entities were consolidated, and approved every significant payment, although no document gave him that authority; everyone simply knew to send them to him.

When he needed heart surgery and was away for ten weeks, the company found out what that meant. Supplier payments slowed to a trickle, a banking facility came up for renewal and stalled because the bank's relationship manager had never met anyone else, and the auditors arrived to find nobody who could explain the consolidation. The company did have a succession plan. It named his deputy as successor. The deputy had never met the banks and had never been shown the consolidation.

The owner put it plainly once things were back to normal: "We had a name in a box. We didn't have a successor."

The Walk-Out Test

When a person in a critical role leaves, three different things leave with them, and each needs its own remedy. We call it the Walk-Out Test: for each critical role, ask what would walk out of the door with the person tomorrow.

Roles differ in which of the three dominates. A senior salesperson's risk is mostly relationships. A long-serving engineer's is mostly knowledge. A founder's or finance head's is often authority, because the company has never written down who may approve what. Knowing which one you are dealing with tells you where to start.

Which roles to start with

Not every role needs this treatment. Start with roles that score high on two measures together: the damage if the role were vacant for three months, and the difficulty of replacing the person in it. Then look at coverage. A role that is high on both and rests on a single person is where succession work pays off first, and it is also what a board should be watching, as we argue in our piece on culture and people metrics for the board.

Then choose a path

Only once a role is transferable does naming a successor mean something. For each critical role, choose one of three honest paths: ready now (someone could step in within weeks), ready later (someone could step in within one to two years with a development plan), or external (the realistic answer is a hire, and the role has been made transferable enough for a new person to pick up quickly).

Here's the contrarian part

Do not start by picking successors. It is the step everybody wants to take first, because it produces a tidy chart, and it is the step that achieves least when a role lives in one person's head. A successor for a role that nobody else understands, whose relationships nobody else holds and whose authority is nowhere written down, is not a successor. They are a hostage to the incumbent's goodwill and memory.

The second point is about the incumbent. Succession planning is often handled around the person in the role, quietly, as if they were the obstacle. The incumbent is your most important ally. Nobody else knows what would walk out of the door. People resist succession planning when it feels like preparation for their replacement, and they support it when it is framed, truthfully, as protecting what they built and freeing them for bigger work. Make documenting the role and sharing its relationships part of their own objectives, and let them help choose who shares them.

In family businesses there is a third point worth separating out. Succession in the family's leadership and succession in the management team are different processes with different timelines. When they are mixed, management succession tends to stall while the family question is unresolved. Keep them distinct, and govern each through its own forum, as we discuss in corporate governance for growing companies.

Why it works

William Rothwell's work on succession planning has long argued that replacement charts, a name for each box, are the weakest form of succession planning, and that effective programmes are systematic efforts to build capability and continuity across the organization rather than lists of heirs. The Walk-Out Test is a practical version of that argument for companies too young to have a bench.

Nonaka and Takeuchi's distinction between explicit and tacit knowledge in The Knowledge-Creating Company explains why documentation alone does not work. Explicit knowledge can be written down; tacit knowledge, the judgement and feel for how things really work, transfers mainly through shared experience. That is why the knowledge remedy pairs documentation with a second person doing the work alongside the incumbent, and why it takes months rather than a handover week.

The authority remedy draws on the same logic as the rest of good governance. Authority that exists only by custom is invisible until it is needed, and it cannot be delegated because nobody has defined it. Writing it down is the same move that stops decision drift, applied to a single role.

A practical checklist

• List your critical roles by rating each role on impact if vacant for three months and difficulty of replacement.
• Mark every critical role that rests on one person. Those are your first priorities, whatever their seniority.
• Run the Walk-Out Test on each: note the knowledge, relationships and authority that would leave tomorrow.
• Introduce a second face to every key external relationship within the next quarter.
• Write down the decisions each critical role holder makes by custom, and delegate the routine ones.
• Pair a second person on the work where knowledge is mostly tacit, not only on the documentation.
• Choose an honest path for each role, ready now, ready later or external, and put the development plans into the strategy and budget cycle alongside your workforce plan.
• Review the plan annually and after every trigger event, and report the status of critical roles to the board.

Ask yourself

• If our most critical person were unavailable for ten weeks starting tomorrow, what would stop first?
• Which of our important external relationships would not know whom to call if one person left?
• Which decisions in our company are made by one person only because everyone knows to send them there?
• Could the person we have named as successor actually step in next month?
• Have we asked the people in our critical roles to help make those roles transferable, or planned around them?

The takeaway

When every critical role rests on one person, succession planning starts before the successor. Find the roles whose loss would hurt most, ask what knowledge, relationships and authority would walk out of the door with the person in each, and make those transferable, with the incumbent's help. Name successors afterwards, honestly. It is the same logic as talent management as a loop: continuity is built into how the work is done, not written into a chart.