This study was motivated by persistent concerns regarding instructional quality, teacher effectiveness, and weak implementation of educational standards in early childhood centres despite increasing policy attention to the sector. Specifically, the study examined the contributions of human capital competencies and policy adherence to the content delivery capacity of Early Childhood Educators in Southwestern Nigeria. The descriptive survey research design of correlational type was adopted for the study. The population comprised Early Childhood Educators in Lagos, Ogun, and Oyo States, while a stratified random sampling technique was used to select 400 respondents for the study. Two instruments namely the Human-capital Competencies, Policy-adherence Delivery Capacity Questionnaire (HCPDCQ) and the Early Childhood Educator Class Observation Checklist (ECECOC) were used for data collection. The instruments yielded reliability coefficients of 0.83 and 0.78 respectively. Data collected were analysed using descriptive statistics and regression analysis at 0.05 level of significance. Findings revealed that human capital competencies made a substantially higher contribution to content delivery capacity (β = 0.234) than policy adherence (β = 0.074). Regression analysis further showed that human capital competencies significantly predicted content delivery capacity of Early Childhood Educators (t = 2.098; p < 0.05), while policy adherence did not significantly contribute to content delivery capacity (t = 0.668; p > 0.05). The study concluded that teacher competencies such as child development knowledge, communication skills, and innovative instructional abilities are stronger determinants of effective educational service delivery than policy adherence alone. The study therefore recommended regular competency-based professional development programmes, strengthened teacher preparation frameworks, and improved monitoring mechanisms to ensure effective implementation of educational policies in early childhood centres in Southwestern Nigeria.