There are different work visas you can sponsor your foreign workers for, after which they may be eligible for permanent residency. You should consider the following:
Temporary Skill Shortage Visa (TSS Visa)
Employer Nomination Scheme (subclass 186)
Subclass 494 Skilled Employer Sponsored (Regional)
Subclass 400 Temporary Work (Short Stay Specialist) visa
Subclass 403 Temporary Work (International Relations) visa
Subclass 407 Training visa
Subclass 408 Temporary Activity visa
Labor agreements