Greetings,

I have just joined a job few months ago as an electrical site superintendent, my work is to supervise the construction( wiring, installing, megger tests, troubleshooting,...etc). I am intending to get training courses that include electrical tests usually done in the field of construction such as meggers, and also electrical troubleshooting. Any recommendations on training centers in the UK or USA. Note that I have two weeks vacation every six months.So the course must be a short one.

 

That's ambitious, get the job then the qualifications!
Study up on the NEC and Eustace Soares book on Grounding.
In U.K. there used to be City and Guilds for trade training.
https://www.cityandguilds.com/
Max.