Ok. The problem is that you have to prove that there is no one qualified to do that in the U.S. already. They won't take just your word for it. So, assuming that he does not have a bachelor's degree and the job does not require a bachelor's degree, you are looking at an H-2B visa.
For an H-2B worker visa, it is expensive and difficult to get because you, the employer, would have to go through an expensive process called a Labor Certification where the position is advertised in the local media, you must receive all resumes and eliminate all candidates for valid reasons, not just because you have a job for your brother-in-law. This is to prove that he would not be taking a job away from a U.S. worker. Here is a link:
Also, because they are used up for this year, you will need to apply on April 1, 2016 to start working on October 1, 2016 or later. Here is a link in regards ***** ***** H-2B cap
After that, a green card through work should also be possible under the EB-3 process. Here is a link:
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