The success of every organization is dependent on the strategies put in place to acquire, grow, and retain top talent to enhance employee performances. Today’s greatest challenge faced by managers in the wake of globalization, developing technology and workforce diversity is competition for talented employees which has increased considerably. These emerging trends have led organizations focus on effective strategies for talent management. The aim of this study was to establish the effect of talent management strategies on performance of National Police Service officers in Nairobi County. This study focused on establishing the effects of performance appraisal on employee performance in the National Police Service within Nairobi County. The study was underpinned by the Talent-Based Theory. This study embraced descriptive survey research design in which Yamen’s formula for sample size determination was used to arrive at a sample of 351 respondents. The study adopted questionnaires and interviews as the research instruments for data collection. The study questionnaire was tested for validity by doing a pretest, thus content and criterion validity that informed refinement of the items to enhance validity. Reliability of the questionnaire was ascertained using test-retest method where Cronbach’s Alpha coefficient of reliability was computed. Data collected was analyzed using the Statistical Package for the Social Sciences (SPSS) Version 23.0 for windows. Both Descriptive and inferential statistics were analyzed in the study. The findings of the study revealed a statistically significant relationship between performance appraisal and employee performance in the National Police Service in Nairobi County to the extent that a unit change in performance appraisal practices resulted in 0.772 unit change in employee performance in the National Police Service in Nairobi County, Kenya. The study recommended that talent management practices should be emphasized as doing so brings about superior organizational performance. Key words: Talent Management, Performance Appraisal, Employee Performance, National Police Service DOI: 10.7176/PPAR/11-4-06 Publication date: May 31 st 2021