This study examined the influence of office ergonomics on employee performance in information management roles of telecommunication companies in Delta State, Nigeria. The specific objectives were to investigate the effect of workspace design, ergonomic equipment and tools, and workstation environment on task efficiency and quality of output. The study was anchored on the Person–Environment Fit Theory, which posits that congruence between individuals and their work environment enhances performance outcomes. The study adopted a survey design and a sample of 300 respondents was drawn from a population of 1,200 employees and stratified random sampling technique was used to draw the sample. The researchers collected data using a structured questionnaire validated by two experts in office and information management, Delta State Univeristiy, Abraka and one expert in measurement and evaluation, Nnamdi Azikiwe Univerisity, Awka. The research instrument was tested for reliability using Cronbach’s Alpha, which yielded coefficients score of 0.78. Data was analyzed using descriptive statistics, Pearson correlation, and regression analysis. Findings revealed that workspace design significantly influenced employee task efficiency and quality of output. Ergonomic equipment and tools were found to reduce fatigue and improve accuracy in handling information management tasks. Furthermore, the workstation environment, including lighting, ventilation, and noise control, had a significant effect on performance outcomes. Regression analysis indicated that office ergonomics dimensions jointly predicted employee performance. The study concluded that ergonomics is not a luxury but a strategic requirement for improving employee efficiency and quality of service delivery in telecommunication firms. It recommended that organizations invest in workspace redesign, provide ergonomic equipment, enhance workstation environments, and institutionalize ergonomic policies and training to sustain employee productivity.