Marketing to large companies is a team sport. You cannot expect to just target the decision maker and convert them. You need to really understand how enterprises make purchase decisions and also that you have diverse groups of stakeholders, from the end users, to IT, to Finance to Purchasing to the Decision Maker, to market and convince. So if your marketing strategy is just to target the decision maker, you will fail. What you need is to have a credible story for each of the constituents and reach out to them and help them build a business case as to why they should go with your product/service. Only then would you be successful in reaching the decision makers.