Hi Mario,
Mauritius is currently undergoing a major development in terms of infrastructure for the ebene cybercity and malls. But these projects are typically executed by multinational companies such as BSI (Blue Star India)
Blue Star India - Major projects executed
Listed some of these so that you can get an idea.
[*] Business park of Mauritius - Mauritius
[*] Bank of Mauritius - Mauritius
[*] State Bank of Mauritius, Mauritius
[*] Ebene Cybercity, Mauritius
So this leaves the individual market and small to medium sized companies. This segment is already addressed by local companies which both sell, install and offer maintenance of the air conditioning system. Perhaps, you could look for employment in these companies.
And BTW, if you have an engineering degree, you need to be registered. Private companies don't care if you are registered or not....
CRPE - The Council of Registered Professional Engineers of Mauritius