- Deutsche Bank (financial services)
- D-TRUST (certificates)
- Fraunhofer SIT (IT security training for T.I.S.P.)
- Fraunhofer IESE (IT security training for T.P.S.S.E.)
- GData (virus protection)*
- hornetsecurity (cloud and mail technology)*
- Institut für Internet-Sicherheit - if(is) (IT security consultancy)*
- isits (IT security training for T.I.S.P., T.P.S.S.E.)*
- Microsoft (computer, software, collaboration)
- NürnbergMesse (exhibition services)
- Philotech (IT security training for T.P.S.S.E.)
- SEC (IT security training for T.P.S.S.E.)
- Secardeo (PKI infrastructure services)*
- Secorvo (IT security training for T.I.S.P., T.P.S.S.E)
- Siemens (communication technology)
- T-Systems (communication)
- Zertificon (PKI infrastructure)*
* "IT Security made in Germany"