This study examined the effect of organisational learning on employee engagement and the mediating influence of supervisory support in some selected pharmaceutical companies in Nigeria. The survey research design was adopted to assess the subject matter. Five hundred and forty-one hundred (541) respondents were surveyed across all the selected pharmaceutical companies in Nigeria with the usage of purposive and stratified sampling technique. Only four hundred and thirtyfour (434) copies of questionnaire representing (80.2%) response rate were correctly filled, returned and analysed for this study. Structural Equation Model (AMOS 23) was adopted for the analysis of the mediating influence of supervisory support on organisational learning and efficacy of employee engagement to work and job task. The results from the test of hypotheses showed that supervisory supports significantly influence organisational learning and employee engagement (R 2 = 0.813