Complex sentence: The second kind of permatemp is an employee of a staffing service provider, payroll agency or Professional Employer Organization, which sends workers to work in a long-term, on-site position for a private company or public employer.
Split into simpler sentences: The second kind of permatemp is an employee of a staffing service provider, payroll agency or Professional Employer Organization. Which sends workers to work in a long-term, on-site position for a private company or public employer.