Officer Candidate School (OCS) is the U.S. Army’s main training academy for prospective Army Officers. The school is generally open to qualified enlisted Noncommissioned Officers, along with civilians who hold at least a four-year college degree.
https://www.goarmy.com/ocs.html
Our Warrant Officers, by leveraging aggressively trained technical expertise combined with leader attributes, operate, manage, and sustain the legal offices of our combat forces around the world, which ensures a ready, globally responsive, and regionally engaged Army JAG Corps. What is a JAGC Warrant Officer?:
https://recruiting.army.mil/ISO/AWOR/270A/
SPECIFIC REQUIREMENTS: In addition to basic Army requirements qualified Warrant Officer candidates must: Be younger than 46 years old (age waivers will be considered on a case-by-case basis) Earn a General Technical score of 110 or higher on the Armed Forces Vocational Aptitude Battery (ASVAB)
https://www.goarmy.com/careers-and-jobs/current-and-prior-service/advance-your-career/warrant-officer.html
A US Army Reserve officer is a commissioned officer in the United States Army Reserve. Instead of serving on active duty, an army reserve officer pursues a regular civilian career, reporting for periodic military training and service formations.
https://www.wisegeek.com/what-is-an-army-reserve-officer.htm
Security officers are responsible for protecting people and property against crime. A security officer must sometimes intervene to stop a crime that is being committed. Security officers at a shopping mall might stop shoplifters. Parking garages often have security officers. Security officers might detain suspects until law enforcement arrives.
http://www.wisegeek.org/what-does-a-security-officer-do.htm
pdf for "army officer oer bullets examples".(Page 1 of about 19 results)