I have worked for CII & FICCI, India's premium Industry forums. The industries I have researched about are food processing, Pharma and health, Agriculture, real estate, travel. I have marketed for events held by these two fora as well. Researching for these forums can be considered professional at the highest level. The stuff you put out is for the world to see and critique, so there is no scope of going wrong in data or facts.
The presentations cannot be boring either, so you cannot go wrong with a dose of humor to break the tedium. Add to the above profession, my passion for writing, and you have an ideal candidate for writing articles.
Of course the deadline would depend on the depth you need in your article. I can write in American or UK English, whatever you choose. The former is the language I have always read popular fiction and other stuff in. The latter, is the one I was educated in, and have to use officially.
Peace.