Before 1990, market and credit risk measures were the major sources of academic research in finance field, motivated by finance industry. However as a consequence of recent financial scandals in the banking industry, involving fraud and human errors, which caused catastrophic losses and even bankruptcy of many institutions around the world, a new and unexplored kind of risk has started to be studied which is called the operational risk. It is defined as the risk of loss resulting from inadequate or failed internal processes, people and systems or from external events. Due to its risk characteristics, it is present in all kind of industry but most academic researches and methodologies are developed for financial institutions. After an extensive search, we didn’t find bibliographic references similar to those in banking sector which could elucidate the operational risk management level of maturity for other sectors. We could not even find a commom definition and classification of operational risks for other industries. Thus, this work intends to explore frameworks and methodologies, developed by financial industry for evaluation and measurement of operational risk, to see how this method can be extended for other industries. Additionally, we applied these concepts and methodologies for a sector of an oil and gas company.