For information on joining the national guard visit http://www.nationalguard.com/guard-basics/faq/joining-the-guard. You can also find information at http://www.military.com/Recruiting/Content/0,13898,rcoe_guard,00.html
Not FOR joining the National Guard or Guard obligations, but that does not mean they can't fire you for other reasons.
The Guard has job catagories in welding.
I would say it would be beneficial to complete a national job search so that you can establish your qualifications . Many job recruiters check these websites when they are looking for qualified applicants
It can be depending on what job you are performing especially in war.
Depending on what kind of guard you are looking to be you could find information about guard jobs through the military or army recruiters. They are always in need of good people. If you are just looking for a security job position you could start by looking at your local job websites like jobing.com.
If that job title is needed, yes.
To a National Guard interveiw you should wear something formal, not jeans or a t-shirt. You should look like you have honor for that honorable job.
If it prevents you from doing your job, then possibly yes.
To give security.because of low payment
It's a part time job. How many days do you need.
President of the US, Governor of Texas, officer, Air National Guard
Listing of bodyguard jobs are available at sites such as SimplyHired. Another method for prospective bodyguards to find a job is by looking through local classifieds, if one lives in an area with many rich or famous people who would desire a guard.