Key Takeaways

• Middle managers translate senior leadership’s strategy into daily operational plans, and they are the most natural pipeline for a company’s future leaders.
• The leadership succession gap is largely a consequence of not developing the middle-management layer in a systematic way.
• The decisive skill for today’s middle managers is adaptive leadership, adjusting how they manage for each generation rather than applying one directive style.
• Turning middle managers into leaders requires a structured path that combines early identification, on-the-job learning, rotation, mentoring, and a link to succession planning.

In most companies, strategy is set in the executive boardroom but succeeds or fails at the middle-management layer. These are the team leads, department heads, and unit managers who translate long-term goals into concrete daily work. When this layer is thin or weak, a company loses not only execution capacity but also its supply of future leaders. The retention gap between two groups of companies shows how real the risk is, with voluntary turnover reaching 20.3% at domestic firms against 12.8% at FDI companies, according to the Talentnet-Mercer 2025 Total Remuneration Survey. This article moves from the role of the middle manager, to the skills the layer needs, how to build a path that develops them into leaders, and the mistakes that make such programs fail.

What Is a Middle Manager and Why Companies Run Short of Future Leaders

A middle manager is a manager who sits between senior leadership and frontline employees, including team leads, department heads, supervisors, and unit managers. Their role is often described as the linchpin or backbone of the organization, because they translate long-term strategy into short-term operational plans while absorbing pressure from both directions, between senior leadership’s expectations and the reality of the team below. This central position is exactly what makes them the most natural source of future leaders, since they already understand both the strategic picture and how operations actually run.

The paradox is that this pivotal layer is often overlooked in development investment. According to Talentnet’s analysis, 56% of companies in Vietnam struggle to find enough leaders and 66% consider the quality of their current leadership below expectations. Among family businesses, only about 20% manage a leadership handover successfully. This gap does not appear by chance; it is the result of years of not building the successor layer from the middle-management ranks themselves.

The problem worsens as good people become harder to keep. Talentnet’s analysis shows 85% of companies see retaining high-potential talent as a major challenge, while young professionals in the early stage of their careers stay with an employer for only about 2.2 years on average. The cost of letting the successor layer break down is not small. Industry data cited by Talentnet shows the cost of replacing one departing employee can reach 50,000 USD, with productivity falling around 23% and absenteeism rising 81% when engagement is low. When the middle-management layer is thin, the consequences travel upward, overloading senior leaders with operational work and pushing growth targets off schedule.

The Skills Middle Managers Need to Become Leaders

Developing middle managers into leaders is not only about adding technical knowledge; it is about widening their people-leadership skills. The most decisive skill today is adaptive leadership, the ability to adjust how one manages for each group of employees rather than imposing a single directive style. This need comes from the reality of a multigenerational workforce. According to Talentnet’s research, 43% of Gen Y and 41% of Gen Z see an authoritarian, harsh management style as the biggest barrier in their relationship with managers, while 37% of Gen Z employees particularly dislike being supervised through traditional direct observation. Among manufacturers specifically, 46% see generational friction as a major challenge.

Adaptive leadership requires middle managers to read what each group needs and adjust how they lead accordingly:

• With Gen Y, grant project ownership and autonomy so the work feels meaningful.
• With Gen X, protect focus time and give direct, to-the-point feedback.
• With Gen Z, provide a transparent career path and early chances to lead meaningful projects.

Beyond leading people, middle managers need business acumen to see past their own department, and change-management capability to guide teams through periods of transformation. The demand for digital skills grows more urgent as technology reshapes how work is done.

Automation will strongly affect the demand for skilled labor in the job market over the next 2 to 3 years.

Mr. Bui Ton Hien, Director of the Institute of Labour Science and Social Affairs

In that context, a strong middle manager has to both upskill the team and keep updating their own digital capability, rather than waiting for the organization to retrain them from scratch.

How to Build a Path That Develops Middle Managers Into Leaders

Building future leaders should not be a fire-fighting response when a seat falls vacant; it should be a structured path that runs years ahead of need. One useful way to frame it is the Build-Buy-Borrow-Bridge model, the four directions for adding leadership talent. Build means developing from within, Buy means hiring strategically from outside, Borrow means using interim experts for short-term needs, and Bridge means enabling internal moves through skill development. For middle managers, Build is the focus, because this is the layer that already carries the strategic and operational understanding to rise. The four steps below turn the Build direction into a concrete program.

Identify high-potential talent early

The first step is to identify who has leadership potential before the company actually needs them. This starts with regular talent reviews, where leaders together assess the team to spot those showing leadership behavior, business thinking, and a solid professional foundation. Identification should be tied to a gap analysis between current capability and the organization’s future needs, rather than chosen by instinct or seniority. Equally important is pinpointing the key roles that shape competitive advantage, which are not necessarily the highest positions on the org chart. When investment concentrates on the right people and the right roles, the program both saves resources and is easier to justify to the executive team.

Apply the 70:20:10 learning model

Effective leadership development does not happen mostly in the classroom. The 70:20:10 model reflects this, with 70% of capability coming from learning on the job, 20% from informal learning through interaction and mentoring, and only 10% from formal training. This approach centers on giving middle managers real stretch assignments, with real risk and real decision authority, instead of just sending them to disconnected skills courses.

We apply the 70:20:10 model for talent development: 70% on-the-job training, 20% informal learning…and 10% formal training.

Ms. Tran Thi Thanh Huong, HR Manager, Gentherm Vietnam

The key is that the 70% of on-the-job learning must be designed on purpose, tied to clear development goals, rather than left to employees to figure out alone and then called experience.

Rotation and mentoring

The two most powerful tools within on-the-job learning are internal rotation and mentoring. Rotation moves middle managers across different functions, for example from research and development into production and then supply chain, so they build a comprehensive business understanding instead of getting stuck in a narrow specialty. Experiencing multiple operational perspectives is the foundation for a manager to develop the strategic thinking of a leader. In parallel, formal mentoring pairs experienced senior managers with high-potential middle managers, transferring not just technical knowledge but also problem-solving methods and leadership thinking that are hard to teach in a classroom. With mentoring programs, the safe approach is to start with a small pilot group, measure the effectiveness of the transfer, and only then scale it across the organization.

Connect performance management to succession planning

The final and most overlooked step is to make performance management part of succession planning. In many places, periodic performance reviews stop at an administrative exercise measuring past results. A better approach uses that same review cycle to identify potential, set development goals, and track readiness for a higher role. A powerful tool here is 360-degree evaluation, gathering feedback from superiors, peers, and subordinates for a complete picture of a manager’s strengths, development areas, and blind spots. When performance and succession are linked, the company always knows who is ready for the next step, instead of scrambling to find someone every time a seat opens.

Mistakes That Make Middle-Manager Development Programs Fail

Even after investing, many middle-manager development programs still fail to produce the leadership layer expected. The four mistakes below are the most common causes.

• Treating leadership development as a few disconnected training courses instead of a structured path. Many companies still rely almost entirely on informal on-the-job learning, so leadership capability forms by chance rather than by design.
• Not tying the program to business strategy. When leadership development is detached from the organization’s real goals and capability needs, companies easily train the wrong people for roles that no longer matter.
• Promoting the strongest technical performer without preparing them for a leadership role. An excellent specialist does not automatically become a good manager, and an unprepared promotion often costs the company both a specialist and a manager.
• Not measuring and having no backup successor. Without a mechanism to track readiness, companies only discover a leadership gap when it is already too late to prepare a replacement.

The skills context makes these mistakes even more costly. According to Talentnet’s analysis, about half of production roles will need new technology skills, but 59% of manufacturers have no reskilling program, creating a widening gap between what the work requires and the capability of the current management layer.

Conclusion

Middle managers are not an operational cost tier to be optimized; they are the layer that decides whether strategy gets executed and whether a company has leaders for the future. Investing in this layer systematically, from early identification, on-the-job learning, rotation, and mentoring to linking performance with succession, is the most sustainable way to close the leadership gap from within.

The companies that hold their advantage over the long term are not those with the most capable leaders right now, but those that continuously produce the next layer of leaders. With talent management and organizational culture consulting, Talentnet works with companies to design a path that develops middle managers into future leaders, tied to strategy and measurable.

Frequently Asked Questions

How are a leadership pipeline and succession planning different?

A leadership pipeline is a continuous flow of leadership talent across multiple levels, developing capability at every tier of the organization. Succession planning is narrower, focused on preparing successors for a few specific key positions. The pipeline creates the supply, while succession planning ensures important seats never sit empty.

When should you develop leaders internally versus hire from outside?

Internal development fits when the company already has potential talent and needs people who understand its culture and operations. Hiring externally makes sense when a genuinely new capability is required or a position must be filled faster than training allows. Most organizations should combine both rather than choosing one.

How long does it take to develop a middle manager into a leader?

There is no fixed number, but most structured programs need several years for a manager to accumulate enough leadership experience. The deciding factor is the quality of the stretch assignments, rotations, and mentoring they go through, not the length of time.

How do you measure the effectiveness of a middle-manager development program?

Track a few core metrics, including the share of leadership roles filled internally, the average time to fill a leadership position, high-potential retention, and the number of people ready for a higher role in the succession bench. These show whether the program is actually producing leaders.

Do small companies need a middle-manager development program?

Yes, and arguably more so. Small companies carry greater risk when a key manager leaves, because they have fewer backup layers. A program does not need to be elaborate; it can start with internal mentoring and purposeful stretch assignments.