The choices are diverse from serving as an Airborne Ranger Infantry officer to serving as a Finance Officer. There is something for everyone and most students get one of their top three choices. Upon graduation, you will go to your branch basic course. After the basic course most lieutenants go to follow on courses for specialty training of leadership training. Infantry officers often go to the Bradley Fighting Vehicle Course and Ranger School.
Lieutenants make leadership and managment decisions daily.
You may be tasked to develop a Company Training Plan, Physical Fitness Program, or Unit Deployment Plan. Whatever mission the Army is tasked to do, it develops or utilizes existing plans to assist in the successful completion of the assigned mission. You will utilized the aforementioned 8 Troop Leading Procedures, Operations Order, and After Action Review to guide and assist you in the accomplishment of the mission. Those leadership and management tools will be learned in Army ROTC years in advance of your commissioning as a lieutenant. You may have over 100 soldiers under your command as a lieutenant.