| Year | Company | Reference Letter | Work Sample | Tools | Language(s) |
|---|---|---|---|---|---|
| 2013/2014 | babbel | Link to PDF | 1st and 2nd level eMail based German customer support (Login required) | Zendesk | German |
| 2006-2011 | snom technology AG | Link to PDF | 2nd Level eMail based German/English customer support for B2B reseller (Login required) | Kayako OTRS | English German |