Writing for industry publications? It's a good idea, and helps to position you as an expert. But don't just propose a single article. Here's a way to get more mileage.
Douglas Kruger is a professional speaker and the author of six business books with Penguin (and counting). He is also a member of Toastmasters International, and Mensa - the High IQ Society. See his videos, or book him as a motivational speaker: www.douglaskruger.com