The study examined the impact of strike action on employee performance in public University in Bayelsa State. The study adopted descriptive survey design. The population of 150 employees which comprises academic staff of Niger Delta University Amassoma, Bayelsa State. 135 sample size was determined using Taro Yamene formula. Data collected from the respondents via questionnaire were analyzed using sample frequency distribution, while hypotheses were tested using chi-square (x2) formula at 0.05 probability level. Findings revealed that the causes of strike actions in tertiary institutions arise due to unnecessary protocols imposed by those in the accounts department or salaries lodged in personal accounts for interests. The study also revealed that wage reductions, resulting from several sources such as taxes, government policies, management initiated institutional welfare etc remain vital reasons for strike actions in institutions of higher learning. Based on the findings, the study concluded that strike action is an ongoing trend in institutions and eradicative measures could be used painstakingly, but possible, and when adopted could bring about a relief in industrial peace and stability in tertiary institutions like Niger Delta University. The study therefore, recommends amongst others that autonomy of tertiary institutions should be an issue that demands urgent approval to avoid unnecessary interference of government in the internal affairs of tertiary institutions.