There has been extensive research on how information communication technology (ICTM) management competencies might increase operational effectiveness. This study examined the impact of management ICT on the internal operations of a business, blending resource-based view (RBV) and dynamic capabilities theory (DCT) perspectives. The analyses in the study cover ICT support for management decision-making abilities on Harare's manufacturing operational firms' performance (OPF). Sustainable competitive advantage (SCA) is a mediator in the research model to enhance the firm's performance—data from 201 managers employed by the manufacturing firm informed the findings. The research hypotheses were tested using structural equation modelling (SEM) that was analysed using SPSS version 24 and AMOS version 21. The results reveal that investment in ICT should be linked to firms' core competencies to maximise firms' value. The results also indicate that effective management of ICT significantly impacts business performance by helping firms achieve sustainable competitive advantage. The study contributes to the literature by combining the RBV and DCT perspectives to explore the impact of ICT competencies on manufacturing firms' performance. The paper recommends that manufacturing firms in Zimbabwe invest more in information communication technology to compete effectively in global markets.