We need professional writers

Num. of articles: 5
Words per article: 500
Information for the blog/website: We manage multiple blogs in digital marketing, health and photography niche. We are looking for writers to write on topics in these areas
Topic: Topics on internet marketing
Tone: Formal/Professional
Outline & Structure: The articles will be all different. Currently we are in need of writers to write on internet marketing topics.

Extra notes: Extensive research may not be required, but a good amount of research is required.