PUBLICLY AVAILABLE RESOURCES:
OWASP Cheat Sheet Series - This resource is useful for ensuring strong security controls throughout the development and deployment of applications and web-based resources
NIST - This is an all-encompassing resource funded by the United States government that gives guidance on all things technical and administrative
MITRE ATT&CK - This resource is a knowledge base of adversary tactics and techniques
CISA - This is a cyber defense agency that works to help build more secure infrastructure and report on current threats
More resources to come...