I would say they are well trained. The only problem is that not many of them have field experience.
A fair no. of them have desk jobs, have gotten used to following the instruction manual and/or passing the buck - because it pays the bills and is also stress-free.
The end result?
We ship in high-value expat engineers - who are not always that qualified, pay them mind-blowing take-home packages (Car, house and driver inclusive), and watch them try to apply specifications from their home countries to our peculiar local conditions.
Hopefully, Naija's Nigerian Content package would also track the no. of indigenous skilled personnel assigned to work on the project. This would constrain Nigerian Companies to train their Engineers to fill such vacancies.
Presently, the tendecy is for the Nigerian company to win the Contract and then deploy expat Engineers to fill the key work slots. Unless the Client insists, our people are content to receive that Foreign Currency day-rate until the next Contract comes along.