There will always be a need for good Networks guys. however nowadays they are just one of the bunch as so many people are up to speed.
If I was to give one good bit of advice to someone who wanted to get involved in Networks it is to be organised.
If you do your exams, know what you are doing and can prove to a company that you can document and diagram your work so it can be follwoed then you are in business.
The industry is full of people that have to reinvent the wheel every time there is an issue