English - Slovakian/Kazakhstan/Polish/Dari/Farsi online interpreter

We are looking for some interpreters for above language pairs with English. Our clients are US or UK organization such as Department of Health, Human Services, insurance agency, clinics, hospital, court...
Requirement:
- Language ability: will have assessment
- Technical stuff:
+ Stable Internet speed with wired connection (Ethernet)
+ Good USB headset
+ Have PC windows OS