Complex sentence: It has a presence in Australia, New Zealand, USA, United Kingdom, Germany, Switzerland, Belgium and Ireland; it is the largest medical laboratory provider in Australasia and Europe and the third largest in the USA, it employs over 32,000 people.
Split into simpler sentences: It has a presence in Australia, New Zealand, USA, United Kingdom, Germany, Switzerland, Belgium and Ireland. Being the largest medical laboratory provider in Australasia and Europe and the third largest in the USA, it employs over 32,000 people.