The growth and development of an organization are contingent upon the effective management of its human resources. However, the adoption of effective human resource management practices in many local non-governmental organizations (NGOs) NGOs operating in the development sector have received insufficient attention. This research aims to explore the impact of strategic management practices on employee performance within non-governmental organizations located in Nairobi City County, Kenya. The specific objectives of this study are to assess the influence of communication, objective setting, strategic leadership, and training on employee performance in non-governmental organizations operating in Nairobi City County, Kenya. The study was guided by expectancy theory, goal setting theory, contingency theory, and human capital theory. A descriptive research design was employed. The population was five prominent NGOs in Nairobi City County, namely Oxfam International, World Vision, USAID, Mercy Corps, and Amnesty International. The study targeted 742 respondents. Stratified sampling method was used and selection of respondents done using simple random sampling method. The sample size was 260 respondents. Data was collected using questionnaires. Questionnaires were piloted to 26 respondents. Validity was ensured using content validity. In addition, Cronbach's alpha test was used to test reliability. Quantitative data was analyzed using descriptive statistical and inferential statistics. The results were presented using tables and figures. The study found that communication, objective setting, strategic leadership and training had a positive significant influence on employee performance in non-governmental organizations in Nairobi City County, Kenya. The study concludes that communication in the workplace is important because it boosts employee morale, engagement, productivity, and satisfaction. Training is important because it represents a good opportunity for employees to grow their knowledge base and improve their job skills to become more effective in the workplace. The study recommends that non-governmental organizations in Nairobi City County, Kenya should focus on the implementation of effective communication channels and tools by including the use of technology such as intranet platforms, project management software, and instant messaging systems. The non-governmental organizations in Nairobi City County, Kenya should ensure that goals are clearly defined, quantifiable, realistic, aligned with the overall objectives of the organization, and have a specific deadline for completion. The non-governmental organizations in Nairobi City County, Kenya should focus on building the skills and capabilities of current and future leaders through training in areas such as communication, decision-making, and conflict resolution, as well as opportunities for leaders to receive feedback and coaching on their performance. Create a culture of transparency and open communication within the organization.