In your opinion, does system maintenance field has a future in high level positions?

Yes , because  in high level positions  we must  care about :

1 - Good customer service .

2 - Ensure efficient product after sale .

3 - Cost reduction in warranty period which increases client confidence .

4 - Serve as a key base for the success of the rest of the company's sales activities and spread as good  publicity for your company .

Yes , it has ,  because the maintenance process means cut of the cost and this tool is needed in all of the companies / organisations.