This study assesses the impact of participation in decision making on job satisfaction, organisational commitment and group commitment. It also seeks to fill the void about the extent of participation in decision making and commitment in Indian public sector undertakings (PSUs). Data were collected from 397 employees working in these different organizations. Structural equation modelling was used to examine the hypothesised relationships. The findings of the present study indicated that participation in decision making had significant relationship with job satisfaction. Job satisfaction was positively related to organisational commitment and group commitment. Participation in decision making has significant impact on organizational commitment but not on group commitment. Group commitment did not have significant impact on organizational commitment. Results suggest that participation in decision making is a key element as it enhances satisfaction of employees with the organization. The implications of these findings for the people holding key managerial responsibilities in public sector undertakings have been discussed.