Your background in sales and business should give you an excellent grounding for writing effective sales copy.
If you drop me an email and you have some good writing samples I may even have an ongoing project that would interest you.
I suggest you read these free posts if you're getting started making money as a copywriter...
Making money as a new copywriter Getting started making money as a copywriter The biggest reason most copywriters will never make money
Kindest regards,
Andrew Cavanagh