Jitsi consulting expert in Europe (best would be Austria, Germany or Switzerland)

I’m looking for an Jitsi consultant who has experience in building/establishing a full size enterprise scale (x-thousends of users) implementation of Jitsi. This should include knowledge about end-to-end setup e.g. including networking dependencies (bandwidth demand, firewall rules/setup, …).
Please only reply if you have done this already and have senior consultant knowledge -and- are able to perform work partly in an European country (have proper work permit or are citizen of above mentioned country).
Thanks a lot, Mike

Hi i have sent a PM.