Vocational programmes are frequently neglected, and they certainly do not guarantee access to employment and better living conditions. Thus high-quality curriculum and its delivery should always remain part of the story. This begs the question as to what is the effect of critical success factors on curricullum delivery process in TVET institutions. In this regard the study was designed to; To find out the correlation between critical success factors and curricullum delivery process in selected ISO certified public TVET institutions in North Rift Region, Kenya, To access the effect of Institutional Culture on curricullum delivery process in selected ISO certified public TVET institutions in North Rift Region, Kenya, asses the moderating role of institutional culture on the effect of critical success factors on curricullum delivery process in in selected ISO certified public TVET institutions in North Rift Region, Kenya. The study adopted an explanatory research design targeting 735 respondents comprising of Deputy HoDs, ISO champion/HoDs trainers from ISO 9001: 2015 certified TVET institutions in the North-Rift region. This study employed stratified random sampling, proportionate, simple random sampling techniques to select the respondents to be included in the sample. Kerjcie and Morgan (1970) formulae for determining the sample size he sample of the trainers was 252 as obtained using Krejcie and Morgan (1970). The study used questionnaires for data collection. Data was analysed by use of inferential statistics. using the Statistical Package for Social Sciences (SPSS), version 25. From the findings critical success factors such as ISO training and communication are significantly correlated with curriculum delivery with the correlation coefficient ranging of r = .789** and r=.767** significantly. 15.4% percent changes in curriculum delivery in in selected public ISO certified TVET institutions in North Rift region, Kenya could be accounted to institutional culture. With institutional culture moderator, the variables jointly explained 68.6 percent (R2= 0.686) variation in sustenance of curriculum delivery process. There fore the TVET institutions should set instructional cultures which engenders high educational goals and high human values for synergistic effect of employee critical factors and sustenance of curricullum delivery process. The institutional culture must nuture the uptake of ISO training and dissemination of information geared towards curricullum delivery.