Rod wants to change careers and get into the technology field. Leo says that following his interest is a good place to start. Starting his own app development may be a good idea, but it's not for everyone. Most people don't make a lot of money doing that. While he can learn to program, that doesn't mean he has the aptitude. IT Services is a growing field if he's good with people. Networking is also a great skill to have if he's mechanical.
If he's trying to get a job, certification will give him proof that he can do the job when he doesn't have a resume to back it up. Leo suggests checking out ITProTV. MIT posts all its IT courses online for free too. iTunes University is a good source as well.
Leo also says don't throw out his experience. He can use the special knowledge in his current field to address needs with apps. He should follow his heart, but do it with clear eyes and know where the marketplace is going.