As you complete each content writing gig, or as you gain more experience in a permanent position, add each article or piece of writing to an online portfolio. This will then help you network for other writing projects and positions in the future. With enough clips and contacts, you may then be able to freelance and work for yourself as a content writer.
I have previously worked as a copy writer and my current position is content development. In my current position, I work at a fairly progressive, young and energetic company. In this company I do both content development and copy writing. I am of the opinion that having a distinction between the two roles to be a more old school way of thinking. Especially in this day and age it is important to be flexible and adaptable, even more so if you are a writer. I think that people who are stuck being on one side of the coin and refusing to adapt will be left behind and be out of a job in 10 years time.