Incidents can incur damage on people, environment, asset and even on Company's reputation. Therefore, effective learning from incidents plays a critical role in Company's HSE management system. Effective learning from incidents can also be one of predictors of an effective HSE management system and positive safety culture (Reason, 2016). This study was undertaken to discuss Mahakam's (now operated by PT. X) experience in the implementation of learning from incidents and its contribution to improve Company's safety performance. Learning cycle from Jacobsson is used as main reference to assess the effectiveness of learning from incidents system in the company (Jacobsson et al., 2011).