Abstarct: Today, most organizations are required for the development of strategic planing to increase their capabilities and reduce the risk of long-term growth and viability of their operations. Issues that engineers and scientists are often faced with having to make decisions under uncertainty. Therefore, in this study uncertainty situation in decision making environment has been supposed. In this study, strength, weakness, opportunities and threats of Nasr Niroo Yazd engineering company have been ranked by using principles of strategic planning in uncertainty environment, and Grey decision-making methods. The most important strength of this company is determined as cost management, and the most important weakness of the company is identified as lack of liquidity, as well as the conclusion of major contracts in the future, is the most important opportunity of this company , and the company's most important threat has been identified as facing new competitors in the oil and gas industry.