Whats the best MOS for a high school graduate that can lead to a good civilian salary?

PO2 Steven Smith ....can you provide some good info on this topic.....

Those are all the standard answers, and they are good answers, but, if you can get into cyber command, and enjoy doing JavaScript along with other coding, then a career in cyber security has a pretty good future. Infantry will lead to a future as a contractor overseas, as long as you get multiple deployments during your active years. Combat engineers become heavy equipment operators, and transportation have direct translation to big rig drivers in the civilian world. The first thing you need to know is that your military occupation specialty is your life until you either ETS, or reenlist for a different MOS. It is very difficult to change jobs, reenlistment is pretty much the only time you can do that, and if your MOS is critical, they will offer a bonus to talk you out of changing jobs. Cyber command is the hot and sexy newbie on the block, so the bonuses are good, but the job is seriously crucial to the internet security of the nation, as well as military operations, So only the best will be chosen for that. Good luck

I joined to fight for my country. If you want a decent salary job in the civilian world stay a civilian and go to tech school or med school.

Not a good reason to pick an MOS, but if that's your plan Air Traffic Control.

Your question requires the responder to assume certain things since you don’t go into details.
Your question also assumes that a “good civilian salary” is primarily skill-dependent.
Since we’ve just come through a period of economic stagnation (when you look at the real numbers, not the news headlines) and it’s still too early to tell whether that will change with the new policies, the fact remains that there are millions of people out there without a job and you will be competing with them. And although employers may be looking for certain skills, the fact is that most of them will focus on hiring the right people.
The right people are defined by their attitudes, their interaction capabilities and their potential for leadership. You can develop and hone those skills in any of the military’s “MOSs”, although even that presumes you have good leaders mentoring you and providing an example you can emulate. So the specific skills you acquire may be important, but it is the work ethic and the attitudes that you develop that will ensure your entry into the job market.
Having said that, you have to look at yourself. What are your current skills? What can you do well? What do you like? What are your test scores and what do they qualify you for? Check those scores again. What do they qualify you for?
Then go back to that “what do you like” question. Take some time to think the answer through, but ask yourself “Of those things I qualify for, what do I really think that I would ENJOY doing?” Because time and again, it has been proven that what people enjoy doing, they do well. If you enjoy what you are doing, you will be successful doing it. I don’t care what it is: programming, cooking, coordinating, talking, writing, traveling, leading… whatever. If you enjoy it, you will excel at it… and if you excel at it, sooner or later you will be very well compensated for doing what you enjoy.
So don’t get hung up on “looking for the eventual money-making MOS”. Think about who you are and what you like to do. Then do THAT… and do it well. Go out of your way to develop a good work ethic. Learn skills related to interactions with other people. Look for good leaders and learn from them.
The money will take care of itself.

Engineer; power plant!!

College. Look at engineers, not combat but the construction ones. Your best bet to go pick what you like do your time and use your GI Bill. Or compete for a green to gold scholarship and be an officer.

Cyber or 25B.

Something in IT/Cyber, Intel or Medical.

It really depends what type of student and grades you made....the better the grades the more sophisticated the job...Computers, Electronic Warfare, Test Instrument Repair, Radar/Microwave Repair, there are many more...just Google them and select what you'd like to do...then go to the Recruiter and see what the requirements are...good luck...for me out of high school I went into what was called Fixed Station Radio Repair 271.1 relates to 32Bxx...after the Army worked for GE Mobile Radio Dept then US Navy Systems, then a small Electronics Manufacturers Representative Co. and finally, Electronics Specialist for NASA....a great exciting life! Give it a try.