My two cents

Based on the job offers of Swiss organisations and Linkedin Profiles of Swiss service designers that I could find, these organisations seem to have in-house service designers and therefore use Service Design:

1. Swisscom

2. Helsana

3. Swiss Re

4. Allianz

5. Groupe Mutuel

6. Zurich Insurance

7. Roche

8. Swiss Federal Institute of Intellectual Property IGE IPI

9. Federal Office of Information Technology, Systems and Telecommunication FOITT

10. City of Zurich

11. Raiffeisen

12. UBS

13. Crédit Suisse

14. Zürcher Kantonal Bank

15. ZHAW

16. Deloitte

17. Fjord, Accenture Song

More Service Design questions and answers like this one

Check out all the questions about Service Design in Switzerland or these questions about Service Design as a career.