There has been a rise in the number of temporary jobs available in Nigeria, which has had a negative impact on worker productivity. It is becoming increasingly difficult to absorb workers into benefit programmes like social protection systems, and even if they are, the benefits that are made accessible to them are pitiful, due to the prevalence of casualization. The purpose of this research was to analyze the effect of casualization on GTCO employees' job attitudes. This study adopted descriptive research design. The target population of study comprised of Ten thousand and ten GTCO temporary and casual employees. Three hundred and eighty-four (384) temporary and casual employees were chosen with the help of purposive and snowball sampling techniques as the sample size. The hypotheses were tested using Pearson Correlation, and the data were analyzed using frequency and descriptive statistics. The results showed that workers' job commitment was lower when they were employed on a contract basis, that they were less satisfied when they were employed for a shorter period of time, and that they were more likely to leave their current job if they were on a temporary contract. The study concluded, among other things, that businesses should work toward making it easier for workers to transition from temporary to permanent positions following the legally mandated six (6) month trial term.