The United States Army uses various personnel management systems to classify soldiers in different specialties which they receive specialized and formal training on once they have successfully completed Basic Combat Training (BCT).
Enlisted soldiers are categorized by their assigned job called a Military Occupational Specialty (MOS). MOS are labeled with a short alphanumerical code called a military occupational core specialty code (MOSC), which consists of a two-digit number appended by a Latin letter. Related MOSs are grouped together by Career Management Fields (CMF). For example, an enlisted soldier with MOSC 11B works as an infantryman (his MOS), and is part of CMF 11 (the CMF for infantry).
Commissioned officers are classified by their area of concentration, or AOC. Just like enlisted MOSCs, AOCs are two digits plus a letter. Related AOCs are grouped together by specific branch of the Army or by broader in scope functional areas (FA). Typically, an officer will start in an AOC of a specific branch and move up to an FA AOC.
Warrant officers are classified by warrant officer military occupational specialty, or WOMOS. Codes consists of three digits plus a letter. Related WOMOS are grouped together by Army branch.
The Army is currently restructuring its personnel management systems, as of 2019.[1][2][3] Changes took place in 2004 and continued into 2013. Changes include deleting obsolete jobs, merging redundant jobs, and using common numbers for both enlisted CMFs and officer AOCs (e.g. "35" is military intelligence for both officers and enlisted).
Immaterial & Personnel Special Reporting Codes
Officer
00A Duties Unassigned
00B General Officer
00C Relieved from Duty; Sick in Hospital or Quarters
00D Newly Commissioned Officers Awaiting Entry on Active Duty for Officer Basic Course Attendance
00E Student Officer
01A Officer Generalist
01B Aviation/Infantry/Armor/MI Immaterial
01C Chemical/Engineer/MP Immaterial
01D Army Financial Management/Adjutant General immaterial
11B Infantryman (includes soldiers formerly designated 11M [Mechanized] and 11H [Anti-armor]) 11B Infantryman is the basic infantry soldier MOS of the US Army.
11C Indirect Fire Infantryman (Mortarman)
11D Armor Reconnaissance Specialist
11E Armor Crewmen
11H Heavy Anti-armor Weapons Crewman
11M Fighting Vehicle Infantryman
11X Undetermined Infantry (Open Enlistment Option, B/C determined during training.)
Prior to 1999, the Engineer designations were 12 series and 83 series.
In 1999, CMF 83 changed to CMF 51.
In 2004, CMF 51 changed to CMF 21.
In 2004, the engineer designation changed from 12 to 21.
In 2009, the engineer designation was changed again, from CMF 21 to CMF 12.
In 2013, the engineer officer designations 12B (Combat Engineer) and 12D (Facilities/Contract Construction Management Engineer (FCCME)) were consolidated into 12A.
Officer
12A Engineer; General Engineer
Warrant
120A Construction Engineer Technician
125D Geospatial Information Technician
Enlisted
12A Engineer Senior Sergeant
12B Combat Engineer
12C Bridge Crewmember
12D Diver
12G Quarrying Specialist (RC)
12H Construction Engineering Supervisor
12K Plumber
12M Firefighter
12N Horizontal Construction Engineer
12P Prime Power Production Specialist
12Q Power Line Distribution Specialist (RC)
12R Interior Electrician
12T Technical Engineer
12V Concrete and Asphalt Equipment Operator; No longer in use
As of 1 Jan 2008, all officers from Quartermaster, Transportation and Ordnance branches who have attended the Captain's Career Course, with the exception of EOD officers (89E), are transitioned to the Logistics branch.
