Digitalization plays a vital role in today's society and firms cannot afford not to be digitalized. The Sustainable competitiveness and digitalization of supply chains of listed oil and gas marketing and production companies on the Nigerian Exchange Group (NGX) were the main subjects of this study. The population and the sample size under examination consist of nine (9) listed oil and gas marketing and production firms on NGX since the listed oil and gas marketing and production firms on the Nigerian Exchange Group. This research used a basic random sample technique, and a sample frame of frame of forty-five (45) respondents per firm, and four hundred and five (405) management staff members took part in the survey. Original materials, such as questionnaires, provided information that was used to obtain primary data for the study. 405 respondents were given a 5-point Likert scale questionnaire; 385 of those copies were returned and were functional copies, yielding a 95% response rate. The hypothesis was tested using the basic regression approach. The findings showed that productivity is strongly, positively, and significantly impacted by supply chain digitization. Accordingly, the study concludes that supply chain digitalization significantly affects listed oil and gas marketing and production enterprises in Nigeria's ability to remain competitive over time. To achieve lasting competitiveness, it also recommends that the management of these organizations implement enough supply chain digitization projects to link with productivity.