The study has sought to investigate the effect of leadership styles practiced in an organization on employee performance. More specifically, this research is aimed to study: 1) the existing level of transformational leadership and work efficiency of employees at a private company, 2) employees’ work efficiency based on individual factors, and 3) the relationship between transformation leadership and employees’ work efficiency at a private company. The sample size includes 104 employees of a private company. The questionnaires have been distributed to collect the data. The statistical data used for the analysis includes percentage, mean, standard deviation, and Pearson’s product moment correlation coefficient. The results reveal that: 1) the majority of the respondents are male, aged between 31-40 years old, holding a bachelor degree, and having work experience between 4 and 6 years; 2) the level of transformational leadership of employees is quite high. When considered separately by dimensions, it has been found that inspirational motivation and idealized influence are also at high level while intellectual stimulation and individualized consideration are at the moderate level; 3) the overall work effectiveness of employees has high level, 4) the individual variables of age, education, work experience and position have no relationship with work efficiency; and 5) there is a relationship between transformational leadership and employees’ work efficiency at the level of significance being 0.01.