🛑 The Single Most Important Decision You’ll Make: Your MOS. Listen up: Your MOS (job) is the single biggest factor that will determine how you view your entire Army experience. It’s simple math: If you enjoy doing what you’re doing, you’ll probably enjoy your career. If you hate what you’re doing, you’re probably gonna hate your Army career. That’s why I believe picking an MOS you can see yourself doing long-term—both while serving in the Army and potentially transitioning into a civilian caree