HI, My name is Rahul, I have read your requirement which is only possible with google adword. if you are thinking to hire a SEO expert then it will not fulfill your requirement. If i understand your requirement you are running a tech support company and you need calls from USA. If i am right then i want to say do not go for SEO right now. Just set up a PPC and run your business.
If you want i can do that for you, I have done it done for several tech supports.
My Skills are SEO, Google adwords, Analytics, Webmaster and Keyword planner