Job Facts About Marine Corps Legal Services Specialists (MOS 4421)

These Specialists Are Like Legal Secretaries in the Marine Corps

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Like other branches of the U.S. military, the Marine Corps has a large legal administration department, not all of whom are lawyers. These are jobs that may be suitable training for those who seek careers in the legal profession after their military careers.

This area includes several enlisted jobs as well, with vital roles in the legal military process. The job of military occupational specialty (MOS) 4421, the legal services specialist, encompasses almost every facet of legal administration within the Marine Corps.


Their general duties include legal operational, managerial, clerical and administrative duties within a legal services support section (LSSS), law center, or office of the staff judge advocate. 

The only area in the legal administration section that the legal services specialist isn't involved in is courts-martial reporting, which is handled by MOS 4429, legal services reporter.

The civilian equivalent of the legal services specialist would be a legal secretary or paralegal. 

Duties of Legal Services Specialists

Marines in this position handle all variety of legal work, including research, preparing forms, reports, wills, powers of attorney and other documents that deal with legal and quasi-legal matters. Their office responsibilities include checking any completed work for typos, keeping correspondence, directives and other files in order. If they're senior in grade, this position will act as legal services chief and senior enlisted adviser directly responsible to the officer in charge or staff judge advocate.


The legal services chief acts as the active liaison between the command when dealing with enlisted policy and duty assignments, and adviser to the judge advocates with regard to enlisted instruction and supervision. Some Marines may attend follow-on training at the legal services scopist course. Legal services scopists assist in the preparation and assembly of typewritten, summarized or verbatim transcripts.

Job Requirements for MOS 4421

To be qualified for this position, a Marine needs a general technical (GT) score of 100 or higher on the Armed Services Vocational Aptitude Battery (ASVAB) test. Since they'll be dealing with a lot of documents, legal services specialists need to be able to type 35 words per minute. And they'll be required to complete the legal services specialist course. 

The nature of the job, involving potentially legally-sensitive information requires that legal services specialists have no nonjuidicial punishments on record. If they've been convicted by a court-martial or civilian court for any offense involving controlled substances, or any offense involving moral turpitude, recruits would not be eligible for this MOS.

A job similar to legal services specialist would be MOS 0151, administrative clerk. This job's responsibilities include clerical and administrative duties in a more general office setting, whereas MOS 4421 has specific legal administrative duties.

Duties: For a complete listing of duties and tasks, refer to MCO 1510.51, Individual Training Standards.

Related Department of Labor Occupation Codes:

Legal secretary 201.362-010.

Paralegal Assistant 119.267-026.

Related Marine Corps Jobs:

Administrative Clerk, 0151.

Above information derived from MCBUL 1200, parts 2 and 3