“…Although past studies (Adesanya et al, 2018;Adi, 2015;Boohene, 2018;Eisenhardt, 2013;Gupta et al, 2015;Hakala, 2011;Maragia, 2008;Masona et al, 2015;Nikolov & Urban, 2013;Olawoye, 2016;Patzelt & Shepherd, 2009;Rauch et al, 2009;Ribeiro-Soriano & Urbano, 2010;Rigtering et al, 2017;Song et al, 2019;Sumiati et al, 2019;Van Doorn et al, 2017;Wales et al, 2019;Zhao et al, 2013 among others) have examined the relationship between entrepreneurial orientation, environmental uncertainty and organizational performance in different sectors but there exist paucity of studies that examined the moderating effect of external environment on the link between entrepreneurial orientation and market performance of oil and gas service firms across economies. Likewise, to the best of researcher's knowledge, no known studies within Nigeria context investigated whether external environment moderates the relationship between entrepreneurial orientation and market performance of oil and gas service firms in Nigeria.…”