Cybersecurity engineering is a research field and methodological approach concerned with the systematic application of engineering principles to the design, development, operation, and maintenance of secure and resilient information systems. This discipline investigates methodologies for building trustworthiness into systems proactively from their inception, employing rigorous processes to identify, mitigate, and manage security risks throughout the entire system lifecycle with the goal of ensuring confidentiality, integrity, and availability against evolving cyber threats.