Create an app that rates software.

Yacht GPS software that is secure

Being in bug bounty programs 

Embezzlement detector for banks

Reorchestrating systems after an attack 

Security auditing 

Encrypting private information

Create training courses

Uninstalling the program that removes unused programs and installation files to free some space

Restoring information that has been deleted for people 

Independent Consultant

Track any suspicious activity for an organization

Youtube security tutorials