Pressing: Manufacturing may be one of your biggest expenses. There are a few different ways this can go down: If you have a distribution deal, your distributor may pay for manufacturing up front and then recoup the costs from sales.
When a opening takes place (someone retires) then the Marine Corps promotion board looks at the available candidates and their fitness report scores to fill the vacancy. So make sure you have excellent scores and reports. I picked up SSgt (E6) in 10 years. Gunnery Sergeant (E7) may take up to 14 to 16 years.
Sergeant Major Careers. A sergeant major in the U.S. military is a noncommissioned officer of the highest rank above master sergeant, paygrade E8, and just below warrant officer. It generally takes at least 20 years to attain the rank of Army or Marine Corps sergeant major.