Neonatal mortality rates remain a significant public health concern in many regions of Africa, including Northern Cameroon. A mixed-methods approach was employed, combining quantitative data from CHV training and qualitative insights from focus group discussions. Training significantly reduced neonatal mortality by 25% when compared to baseline levels (p < $0.01; CI95: -30%, -20%). The findings suggest that targeted CHV training programmes are effective in lowering neonatal mortality rates. Further research should explore the sustainability of these interventions and their scalability across other regions with similar demographics. Neonatal mortality, Community Health Volunteers, Training effectiveness, Cameroon Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.