The Dragonfly Machine Learning Engine (MLE) provides the machine learning and data science capabilities included within OPNids. Data science and machine learning promise to counteract the dynamic threat environment created by growing network traffic and increasing threat actor sophistication. This post will provide an overview of the MLE engine itself, reasoning for why data science and cybersecurity go together, and some insight into using the MLE as part of the OPNids system. The Dragonfly MLE is available as part of OPNids. The Dragonfly MLE provides a powerful framework for deploying anomaly detection algorithms, threat intelligence lookups, and machine learning predictions within a network security infrastructure.