I personally don’t think it is a bad idea to have the EC arrange an engineer. In my complex, we generally use the one guy for all our engineering concerns. He knows the complex, he knows what problems we have had and what we have had to have corrected in the past. Another engineer coming into the complex, and not being aware of the past history, may see it in another way.
So perhaps you should have written into the by law that the EC uses the one engineer where ever possible to maintain some consistency in recommendations.