One of the clearest signs of a weak succession system is an employee who cannot be promoted because nobody else can do their job.

I’ve heard versions of this many times. “She’s too critical to the team.” “Nobody else knows that process.” “The client trusts her.” “Let’s wait until we have someone who can take over.”

The manager usually means it as praise. But there is a point at which being indispensable stops being a compliment and becomes a career constraint. If someone is too important to move, the problem may not be their readiness. It may be the organisation’s dependence on them.

How reliability turns into dependence

High performers accumulate dependence. They know how things work, remember what happened last time, rescue difficult client relationships and step in when a colleague is struggling. They become the person a manager calls when something has gone wrong.

After a while, reliability becomes part of the infrastructure. Then the organisation looks at their development plan and says they need more strategic exposure. Of course they do. But they are still carrying everything that made them indispensable in the first place.

Development plans that only add work

When I ask managers what a strong employee needs to do next, there is rarely a shortage of ideas. Lead a larger project. Take on another stakeholder. Mentor someone. Present to the executive team.

What I want to know is what the person will stop doing. If someone already carries six major responsibilities and we add a seventh in the name of development, we have expanded the workload without building the capability the next role requires.

There is a difference between more work and a different kind of responsibility. Three more projects test capacity. Deciding which project gets resources first tests judgement. Building a team that can deliver without your direct involvement tests leadership. A stretch assignment should prepare someone for the next role, not simply prove they can carry more.

Someone has to take the work over

If we want someone to move into a broader role, somebody else must learn their current responsibilities. There may be mistakes in the handover. A client may notice. A manager may have to coach someone who doesn’t yet know everything. That inconvenience is real, and it is necessary.

I’ve sat in talent discussions where everyone agrees someone is ready, and then the conversation stalls on one sentence: “But who will do what she does now?”

That sentence tells us we have developed the individual without developing the system around her. If no one can take over a critical responsibility, that is a succession risk. It should not become a reason to keep the high performer where she is. It should become a reason to build the capacity that lets her move.

Plan the move backwards from the next role

Start with the role she is moving towards. What decisions will she need to make? What relationships will she manage? What will she delegate? Where will she need authority rather than expertise?

Then look at her current role and identify what has to change so she can begin building those experiences. Some responsibilities will have to move. Some authority will have to be given. Some mistakes will have to be tolerated. The organisation may feel less efficient for a while, and waiting for the perfect replacement is not always the answer.

A high performer should not have to remain indispensable in order to remain valued. The question for leaders is not only whether someone is ready for the next role. It is whether the organisation has built enough capacity for her to leave the role she has already mastered.

Link – https://www.linkedin.com/pulse/when-your-best-employee-becomes-too-valuable-move-sonica-d2buc/