Public tertiary institutions in developing countries face persistent performance challenges linked to weak managerial practices and inadequate compensation systems. This study examines the role of supervision and remuneration on employee performance in Nigerian public tertiary institution with evidence from the Nigeria Maritime University, Okerenkoko, Delta State. The paper is situated within the framework of Equity and Expectancy theories; a survey research design was adopted with 254 valid responses from both academic and non-teaching staff of the university. Pearson product-moment correlation analysis was adopted in testing the formulated hypotheses, and the findings reveal significant positive relationships between regular salary payments and employee commitment, performance-based incentives and goal attainment, effective monitoring and work quality, and evaluation/feedback and level of professionalism. The study concludes that supervision and remuneration are complementary drivers of employee performance hence a combination of performance-based rewards, timely remuneration, effective supervision, and monitoring will enhance employees’ commitment, performance and professionalism in Nigerian public universities. The paper recommends among others, a clear design of performance evaluation/appraisal frameworks that ties measurable outcomes to tangible incentives; the strengthening of developmental leadership skills to provide constructive guidance to workers; and the consolidation of monitoring, supervision, evaluation and feedback mechanisms in public tertiary institutions in Nigeria.