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From Assistant to Manager: How Companies Can Grow Leaders From Within

05/06/2026
From Assistant to Manager: How Companies Can Grow Leaders From Within

Companies often look outside for managers, even though strong candidates may already be on the team. They know the processes, understand the customers, have earned their colleagues' trust, and can spot where the business is vulnerable. Yet they may remain in junior roles or go out of sight due to routine formalities, structural barriers, or a failure to take their leadership potential seriously.

Employees in assistant and support roles are especially easy to overlook. A strong assistant coordinates work across several people, anticipates risks, keeps deadlines on track, and helps an executive make decisions. Yet high performance in the current role can slow the next move: the more indispensable someone becomes, the less willing the company may be to let them go.

This creates a paradox: the business needs a new manager, while an employee already doing part of the management work remains an individual contributor. According to LinkedIn, only 33% of organizations have formal internal mobility programs, and just one in five employees feels confident assessing their chances of making an internal move.

Why Potential Goes Unnoticed

Leadership potential is often mistaken for visibility. The person seen as high-potential is the one who speaks confidently in meetings, openly states their ambitions, and volunteers for challenging projects first. Those qualities matter, but they reflect only one kind of leadership behavior.

Employees in support functions influence outcomes in different ways. They connect departments, clarify ambiguous assignments, defuse friction, and keep the team's rhythm steady. Much of this is treated as routine execution, even when the employee is already managing a process and shaping colleagues' decisions.

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Another trap is reliability. Employees are given increasingly responsible assignments because they consistently deliver, yet their title, authority, and pay stay the same. The manager gains an indispensable assistant, while the company loses a potential leader.

Women encounter this problem as early as the first step into management. In McKinsey and LeanIn.Org's Women in the Workplace 2024 study, only 81 women were promoted to manager for every 100 men. Women made up 48% of entry-level employees at the companies studied, but just 39% of managers.

That first appointment shapes the rest of a career. When women are less likely to get an early chance to lead a team, fewer of them enter the pool of candidates for director and executive roles years later. Companies should therefore look not only at senior leadership, but also at who gets that first promotion.

Another source of bad talent decisions is conflating three different qualities: high performance, leadership potential, and the desire to manage people. A strong specialist may have no interest in management, while the most proactive employee may not be ready to take responsibility for other people's results. Companies need to separate these qualities early and preserve an individual-contributor career path as a real form of advancement.

What Shows That an Employee Is Ready to Advance

A job title reveals little about the true scope of a person's work. What they do when established instructions are no longer enough offers a clearer picture. For example, an employee may:

  • Understand the business purpose behind the task. They connect their work to customer needs, financial outcomes, or the team's broader objective. When given a request, they clarify what result the company needs instead of merely completing the assignment as written.
  • Improve the process they own. A future manager notices recurring failures and proposes a better way of working. What matters is the ability to explain the reasoning behind the change, assess its consequences, and turn the solution into a lasting result.
  • Influence colleagues without formal authority. Others turn to them for context, advice, and coordination, and agreements reached with their involvement get carried out. This shows whether an employee can bring people together around a shared objective rather than simply monitor their actions.
  • Make decisions within their area of responsibility. They do not send every disputed issue back to their manager. Instead, they gather information, propose a course of action, and take responsibility for the consequences. They treat mistakes as management problems: identify the cause and change the process so the issue does not recur.
  • Help others grow. A future manager does not hoard knowledge. They explain the work to colleagues, share context, and increase the team's independence. If an employee's value depends entirely on being personally indispensable, the move into management will be difficult.

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At the same time, overtime, constant availability, and a willingness to agree with every decision do not prove leadership potential. They may signal loyalty or weak boundaries, but they do not show the ability to prioritize, allocate resources, or make unpopular decisions.

How to Test Potential and Prepare for a First Management Appointment

Management readiness cannot be judged reliably from an interview impression or the results of a training course. The employee needs a real assignment that expands the scope of responsibility, such as leading a cross-functional project, coordinating a small budget, or temporarily covering for a manager.

That assignment needs clear parameters. The company should define the expected result, the decisions the employee may make independently, the evaluation criteria, and the support available from their manager. It is equally important to agree on what comes next if the work succeeds: an expanded role, participation in an internal selection process, or preparation for a specific opening.

Without those parameters, a test of potential quickly becomes extra work piled on top of existing responsibilities. The employee is still accountable for deadlines and results, but cannot assign tasks, influence resources, or change a weak process. In that case, the company is testing not management ability, but a person's tolerance for overload.

A first appointment also requires a different kind of preparation. An individual contributor is primarily responsible for the quality of their own work; a manager creates the conditions in which other people deliver results. The new manager must learn to assign work, give feedback, resolve conflict, and make decisions with incomplete information. Training is most useful when it is tied to the real situations the employee will face during the transition.

Support should also come from several roles. The direct manager helps set priorities and evaluate results; a mentor works through difficult management decisions; and a sponsor opens doors to visible assignments and advocates for the employee in succession-planning discussions. A mentor gives advice; a sponsor uses influence to make sure the employee gets a chance to act on it.

After the appointment, some previous responsibilities need to move elsewhere. A new manager cannot lead a team effectively while still carrying the full volume of assistant or specialist work. Authority, title, and compensation should change with responsibility. A prolonged "acting" status under the old terms usually means the company is already benefiting from the transition without formally recognizing it.

How to Turn Individual Promotions Into a System

Internal advancement should not depend on one manager's attention alone. That model favors people who work near a strong mentor and know how to speak loudly about their plans, while overlooking employees in less visible functions.

A complete system begins with transparent internal job postings. Employees should be able to see available roles, requirements, and possible next steps. A candidate for management may not yet meet every requirement, but they should understand what experience they need and where they can gain it.

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The next element is regular talent reviews. Managers should discuss not only employees' current performance, but also their readiness for more complex assignments. Assistant, administrative, and coordination roles deserve separate attention: what decisions is the employee already making, who do they work with, and which processes do they effectively hold together?

Project assignments help bridge the gap between training and a formal promotion. Schneider Electric uses Open Talent Market, an internal platform that connects employees with job openings, temporary projects, and mentors. By the first quarter of 2022, it had facilitated more than 3,000 mentoring connections and an equal number of part-time project roles; the company continues to use the platform as part of its career development system.

Unilever applies a similar principle. Its internal FLEX Experiences platform matches employees with short-term assignments on other teams, allowing them to gain experience beyond their core role before making a permanent career move.

These tools address several needs at once. Employees can test their interest in a new direction, the company can observe how they perform at a different level of responsibility, and the succession pipeline is built on practical experience. Internal mobility is also associated with stronger retention: LinkedIn reports that companies with the highest rates of internal moves see 79% more promotions into management per employee, while average employee tenure is 53% longer.

Yet a platform or job board will not solve the problem if managers hold strong employees back on their teams. Managers should be evaluated in part on how many people under their leadership have gained new skills, moved into other functions, and been prepared for promotion. Employee development then stops being perceived as the loss of a valuable contributor.

The system also needs two equally valued career tracks - management and individual contributor. Otherwise, employees will pursue management for status and higher pay even when people management does not suit them. Strong specialists should be able to expand their influence, responsibility, and compensation without becoming managers.

A company develops leaders when it steadily expands the scope of decisions available to an employee: first a project, then authority, support, and a clear path to appointment. If an assistant or coordinator spends years performing work above their job level while retaining the same status, readiness is no longer the issue. The organization has simply failed to convert visible potential into management capacity.

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