The present study was conducted on the sample of 50 workers employed in open cast mines of BCCL, Dhanbad INDIA. The ultimate aim of the present study was to assess the stressstate and its effect on task performance, job involvement and job satisfaction of workers employed in stress arousing job situations i.e., open cast mines. The following variables were used in the present study: 1 Predictor Variables: Stress states such as mood state energetic arousal, tense arousal, Hedonic tone and anger frustration, motivation, workload, thinking style self focused attention, self esteem, concentration and control and confidence and thinking contents task relevant interference and task irrelevant interference, 2 Criterion Variables: Task Performance Digit span task and Stroop colour task, Job Involvement intrinsic motivation, attachment for work, fulfilment of organizational demand, commitment for work, internalization of organizational goals, organizational identification and job satisfaction job area and management area; and 3 Moderator Variables: Personality Extraversion, Psychoticism and Neuroticism. The results reveal that there is significant difference in pre and post task stress level in motivation, thinking style self esteem and thinking contents task relevant interference. The correlation analysis reveals that Extraversion and Neuroticism dimensions are the major moderator variables. The correlation analysis further reveals significant correlations between stressstate variable and job involvement and job satisfaction. The regression analysis shows that following dimensions and sub dimensions mood state: energetic arousal, thinking style: concentration and thinking contents: task relevant interference and task irrelevant interference of stress states have emerged as important predictors of task performance.