Organizations that consistently develop capable leaders from within demonstrate identifiable, replicable patterns of practice that are systematically underimplemented in most organizations. This article reviews the talent development literature to identify the conditions most strongly associated with internal leadership development effectiveness. We examine the foundational role of challenging job assignments as the primary vehicle for leadership development, the critical and underappreciated role of manager investment in development, the relationship between feedback quality and developmental self-awareness, and the structural conditions that either enable or prevent the talent mobility that development requires. We conclude with implications for how organizations diagnose and close the gap between their development aspirations and their development reality.
The paradox of internal development
Most organizations express a strong preference for developing leaders from within. The reasoning is sound: internal candidates understand the culture, the relationships, and the operational realities that external hires must spend months or years learning. Research consistently confirms that internally developed leaders outperform external hires on retention, cultural integration, and long-term performance (Bower, 2007). And yet, when senior roles open, organizations default to external hiring with surprising frequency, signaling in practice what they deny in strategy: that their development processes are not producing the capability they need.
This paradox is not a mystery. McCall, Lombardo, and Morrison (1988) documented what is still the foundational finding in leadership development research: the vast majority of leadership learning happens through challenging job assignments, not formal training. Executives consistently attribute between 70 and 80 percent of their development to on-the-job experience, with coaching, feedback, and formal programs accounting for the remainder. Organizations that invest primarily in classroom-based development and neglect deliberate assignment management are optimizing the 20 percent while ignoring the 70.
Developmental assignments as the primary vehicle for growth
Developmental assignments are the most powerful and most underutilized tool in leadership development. DeRue and Wellman (2009) found that the developmental value of an assignment depends not just on its objective stretch characteristics but on the degree to which the person in the assignment is able to reflect on and extract learning from the experience. High-challenge assignments without effective reflection and feedback produce stress and failure more reliably than they produce development. The combination of challenge, feedback, and deliberate reflection is required.
Dragoni, Tesluk, Russell, and Oh (2009) examined the conditions under which managers actually developed the capabilities targeted by stretch assignments and found that the quality of developmental goals and manager support were significant moderators of development outcomes. Stretch assignments that are chosen deliberately with specific development objectives, monitored by managers who invest in the learning of their direct reports, and integrated with feedback processes produce substantially larger capability gains than assignments made for operational reasons with development as a secondary consideration.
The assignment architecture that produces the most consistent development includes specific types of challenge: starting something new from a position of ambiguity, fixing something that is broken, navigating significant scope increases, working across organizational boundaries with stakeholders who have no obligation to cooperate, and operating in high-visibility situations where the consequences of failure are real. Spreitzer, McCall, and Mahoney (1997) found that the developmental value of international assignments follows the same pattern: the stretch and novelty of the experience matter more than the geographic location, and the learning is more reliably extracted when it is explicitly targeted rather than assumed to be incidental.
Manager investment in development as an organizational variable
The single most consistent predictor of whether employees receive meaningful development is the quality of the manager they report to. McCauley, Moxley, and Van Velsor (1998) established that manager-provided developmental feedback, assignment to challenging work, and active sponsorship for developmental opportunities account for more variance in individual development than any other organizational variable. The implication is uncomfortable: developmental inequality in organizations is largely a function of managerial inequality, and organizations that do not hold managers accountable for developing their people will systematically under-develop the population they most need to develop.
Reilly, Smither, and Vasilopoulos (1996) studied the effects of upward feedback programs on manager behavior over time and found that managers who received specific, behavioral feedback about their development behaviors improved those behaviors measurably over a twelve-month period, with the improvement sustained at eighteen-month follow-up. The implication is that development as a managerial behavior is teachable and improvable when it is made explicit, measured, and held to account in the same way that financial and operational performance are.
Key finding: The organizations with the strongest internal development pipelines are not those with the best formal training programs. They are those that hold managers accountable for developing their people, use assignment management as a deliberate developmental tool, and build feedback cultures honest enough to give people the information they need to grow.
Feedback quality and the development of accurate self-assessment
The relationship between feedback quality and leadership development is well established but poorly implemented in most organizations. London and Smither (2002) reviewed multi-source feedback research and identified several conditions that determine whether feedback produces development: the credibility of the source, the specificity of the behavioral information, the degree to which the feedback addresses developmentally relevant gaps rather than confirming existing strengths, and the organizational context that determines whether acting on feedback is safe and supported.
In most organizations, these conditions are partially or largely absent. Performance feedback is annual rather than continuous, evaluative rather than developmental, and delivered within a system in which candor carries more risk than inflation. The result is what Atwater and Yammarino (1992) documented as the systematic self-other gap in leadership assessment: leaders who receive neither honest upward feedback nor the corrective experience of visible failure develop increasingly inaccurate self-models that compound their development deficits. Accurate self-assessment is not merely a developmental outcome; it is a prerequisite for the learning behavior that development requires.
Structural conditions for talent mobility and succession depth
Even organizations with strong managers and honest feedback cultures can fail to develop internal candidates if structural barriers prevent the mobility that development requires. Developmental moves across functions, businesses, and geographies are among the highest-value assignments available, and yet they are consistently blocked by managers who are reluctant to release their best people, career systems that reward depth over breadth, and succession processes that fail to identify and actively manage high-potential talent below the senior leadership level.
Groves (2007) found that organizations with formal high-potential identification processes, active succession planning that extends two to three levels below the top, and explicit developmental rotation programs produce significantly higher percentages of senior roles filled internally than those without such structures. The critical finding is that the structural conditions are not expensive or technically complex: they require commitment at the senior leadership level to prioritize development over short-term operational continuity, and accountability systems that measure development outcomes rather than only development activity.
- Atwater, L. E., and Yammarino, F. J. (1992). Does self-other agreement on leadership perceptions moderate the validity of leadership and performance predictions? Personnel Psychology, 45(1), 141-164.
- Bower, J. L. (2007). Solve the succession crisis by growing inside-outside leaders. Harvard Business Review, 85(11), 90-96.
- DeRue, D. S., and Wellman, N. (2009). Developing leaders via experience: The role of developmental challenge, learning orientation, and feedback availability. Journal of Applied Psychology, 94(4), 859-875.
- Dragoni, L., Tesluk, P. E., Russell, J. E. A., and Oh, I. S. (2009). Understanding managerial development: Integrating developmental assignments, learning orientation, and access to developmental opportunities in predicting managerial competencies. Academy of Management Journal, 52(4), 731-743.
- Groves, K. S. (2007). Integrating leadership development and succession planning best practices. Journal of Management Development, 26(3), 239-260.
- London, M., and Smither, J. W. (2002). Feedback orientation, feedback culture, and the longitudinal performance management process. Human Resource Management Review, 12(1), 81-100.
- McCall, M. W., Lombardo, M. M., and Morrison, A. M. (1988). The lessons of experience: How successful executives develop on the job. Lexington Books.
- McCauley, C. D., Moxley, R. S., and Van Velsor, E. (1998). The Center for Creative Leadership handbook of leadership development. Jossey-Bass.
- Reilly, R. R., Smither, J. W., and Vasilopoulos, N. L. (1996). A longitudinal study of upward feedback. Personnel Psychology, 49(3), 599-612.
- Spreitzer, G. M., McCall, M. W., and Mahoney, J. D. (1997). Early identification of international executive potential. Journal of Applied Psychology, 82(1), 6-29.