Serial Entrepreneur and Engineer (Internet/GSM/Telecoms).

Early Internet Provider in Switzerland (Pingnet 1994)
Internet Provider in Sierra Leone, Guinea and Guinea-Bissau (Cajutel)

ISP / Backbone / Hosting / Datacenter / Network / Security / Mobile Networks / Wireless / Radio Amateur.

CEO of Cajutel (SL), Fink Telecom Services GmbH and TeraLink Inc.

Author of UniversalSS7. (github.com/andreasfink/)
Mac Nerd since 1984. ObjC, Mac & Linux

Administrator of mastodon.sl #fedi22