As an ANOBAG employee, your employer will normally need to be affiliated with a Pillar II pension fund. The BVG Auffangeinrichtung, a quasi-governmental entity, could provide a pension fund for your employer. See this link (English):

https://web.aeis.ch/EN/pages/112/LOB...nefits%20plans

An option to ANOBAG, as previously mentioned, would be to use a payroll service such as Payroll Plus. More information is at this link (English):

https://payrollplus.ch/en/freelancer/solution/

With both options, you would have unemployment insurance since you would be employee.