Transitional justice mechanisms (TJMs) have been employed in various post-conflict societies to address historical injustices and promote peacebuilding. Sierra Leone is an example where TJMs were integral to its legal framework, aiming at reconciliation and sustainable development. No specific empirical methods are employed in this theoretical framework study. Instead, the article reviews existing literature on TJMs and their application in Sierra Leone’s legal context. The theoretical framework underscores the critical role of Transitional Justice Mechanisms (TJMs) in legal frameworks for promoting peace and justice in Sierra Leone, providing a pathway for similar applications in other conflict-affected regions. Future research should focus on evaluating the long-term impacts of TJM mechanisms on societal cohesion and sustainable development in Sierra Leone. Policy recommendations suggest strengthening community involvement in TJM processes to enhance their effectiveness.