GitHub Enterprise Server (GHES) offers robust security features for organizations hosting their source code, but administrators can enhance this further through several key practices. Strengthening the Management Console password, limiting site admin and administrative shell access, and using passphrase-protected SSH keys are crucial steps for securing GHES. Regular updates and hot-patch releases should be applied to maintain the latest security fixes without downtime. Enabling two-factor authentication, Transport Layer Security (TLS), subdomain isolation, private mode, and disabling anonymous Git read access enhance the overall security posture. Administrators should also configure a secure backup server, consider using an outbound proxy to control external communications, and restrict network ports to minimize exposure. GHES users are encouraged to explore additional security best practices and seek support or audits from GitHub's Professional Services for comprehensive protection.