Complex sentence: Before discovering his entrepreneurial streak with Niklas, Janus began his career at the help desk of CyberCity, one of Denmark's first ISPs, prior to working at Tele2, the leading consumer oriented pan-European telecom operator, where he met Niklas.
Split into simpler sentences: Before discovering his entrepreneurial streak with Niklas, Janus began his career at the help desk of CyberCity, one of Denmark's first ISPs. Later he worked at Tele2, the leading consumer oriented pan-European telecom operator, where he met Niklas.