Thanks Joanne for the comprehensive answer. Totally agree about number one. Nearly always you cannot implement a program without the buy-in from senior level managers. You need to focus on the savings to the company and you have to have proven healthcare measurables. You are nearly always convincing business people (dollars and cents) about the health benefits and this translates to savings.
Another suggestion, start small implement a plan with a small business and grow from there. You will have a proven track record and can better convince larger corporations of the success.