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Army MOS · Support

420A Human Resources Technician

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Human Resources Technician supervises personnel administration, including office operations, counseling, personnel records, duty assignments, evaluations, and training. This technician interprets personnel system output and regulations, supervises military and civilian staff, prepares reports and correspondence, and processes changes to manpower documents.

Minimum clearance: Secret

Core Skills

  • Personnel system input and output interpretation
  • Manpower document change processing
  • Career counseling and specialist referral coordination
  • Personnel selection, assignment, and utilization planning

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Human Resources Specialists

Personnel records oversight, regulation interpretation, automated personnel-system work, and assistance with civilian hiring transfer directly to HR operations.

How to prepare: Complete a civilian HR compliance course covering EEO, ADA, and employment-record requirements, then practice applying those rules to sample personnel actions.

What the civilian work involves
  • Interpret and explain human resources policies, procedures, laws, standards, or regulations.
  • Hire employees and process hiring-related paperwork.
  • Prepare or maintain employment records related to events, such as hiring, termination, leaves, transfers, or promotions, using human resources management system software.
Civilian tools and software (examples)
  • Microsoft Excel
  • Workday software
  • Adobe Acrobat

Human Resources Managers

Supervision of military and civilian personnel staff, employee evaluation support, and personnel selection and assignment experience provide a foundation for directing civilian HR operations.

How to prepare: Complete a civilian employee-relations course with case exercises in staffing disputes, disciplinary procedures, and labor-contract interpretation.

What the civilian work involves
  • Serve as a link between management and employees by handling questions, interpreting and administering contracts and helping resolve work-related problems.
  • Plan, direct, supervise, and coordinate work activities of subordinates and staff relating to employment, compensation, labor relations, and employee relations.
Civilian tools and software (examples)
  • Microsoft Excel
  • Microsoft Office software
  • Workday software

Notes & Sources

Evidence for this guidance (3 documents)
  1. Army COOL MOC feed: 420A Human Resources Technician

    [1] data/authority/army-codes.json entry 420A (OSD COOL feed, fetched 2026-07-25); DB rank warrant_officer, authority codeType warrant_officer

    Supports: Personnel system input and output interpretation, Manpower document change processing, Career counseling and specialist referral coordination, Personnel selection, assignment, and utilization planning, Human Resources Specialists (O*NET 13-1071.00), Human Resources Managers (O*NET 11-3121.00)

  2. O*NET: Human Resources Specialists

    [2] O*NET 30.3 occupational data

    Supports: Human Resources Specialists (O*NET 13-1071.00)

  3. O*NET: Human Resources Managers

    [3] O*NET 30.3 occupational data

    Supports: Human Resources Managers (O*NET 11-3121.00)

Defense contractor jobs for 420A

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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