This research aims to identify the role of line managers and leaders in employee development in organizations, with a focus on Marks and Spencer. The research objectives include understanding the importance of line managers and leaders for employee development, identifying employee development methods utilized by them, and determining the challenges faced by them in evolving the development process of employees. The research methodology includes a survey-based approach with a sample size of 30 employees from Marks and Spencer. The findings suggest that employee development is necessary for an organization to perform effectively, and line managers and leaders play a significant role in it. The major employee development methods used by them include training, mentoring, job rotation, and 360-degree performance review. The challenges faced by them include leading a team in a quality manner, deciding employee development methods, and encouraging staff to develop professionally.