Styles of thinking set different paths for an entrepreneur's perception and strategic action. In order to understand the environmental consequences of a thinking style, we investigated the relations between entrepreneurs' linear and nonlinear styles of thinking with their perception of environmental uncertainty in their businesses. Furthermore, we tested the effect of the entrepreneurs' linear and nonlinear style of thinking on their newly established firms' orientation towards preserving the surrounding internal and external environment. Entrepreneurs with linear or rational thinking styles prefer more tangible data, information, facts, and analytical tools, and entrepreneurs with nonlinear or non-rational thinking styles rely more on internal feelings, impressions, imagination, creativity, and sensations when making important organizational decisions. By using cross-sectional survey data from 144 entrepreneurs in post-sanction Iran (2016-2017), we found that entrepreneurs with a linear style of thinking, in comparison to entrepreneurs with a nonlinear style of thinking, perceive a higher level of environmental state, effect, and response uncertainty in their business context. Furthermore, our survey results reveal that newly established firms by entrepreneurs with nonlinear styles of thinking have a more external environmental orientation, while newly established firms by entrepreneurs with a linear style of thinking have a more internal environmental orientation. Recognizing this contingency advances our understanding of how entrepreneurs perceive and enact their environments.