Marine Corps · MOS history

0612 Tactical Switching Operator (PMOS)

The FY19 MOS Manual deleted MOS 0612, Tactical Switching Operator (PMOS), as indicated by remark 3. The entry does not identify a successor specialty.

Search legacy codes Browse Marine Corps specialties

Documented history

Tactical Switching Operator (PMOS)

1 October 2018 was the scheduled active-duty-component batch date for changes in the Marine Corps Total Force System (MCTFS), not a universal individual qualification or retraining date.

Reserve retraining for PSMRP, Active Reserve and Selected Marine Corps Reserve groups was to be coordinated as required for conversion, subject to available funds.
Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists required appropriate service record book entries using the headquarters conversion action as authority.
Formal schools were to continue awarding current MOSs until a MARADMIN directed implementation.

Source extraction notes

Figure 4-1 remarks: 3. Paragraph 4001.1b schedules the active duty component MCTFS batch for 1 October 2018. Paragraph 4001.6 separately covers Reserve retraining, subject to available funds for the specified retraining groups, and record updates for Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists. Under paragraph 4002.3, formal schools keep awarding current MOSs until a MARADMIN directs implementation. The batch date is not a documented universal individual qualification or retraining date.

Source documents (1)

Reviewed September 24, 2026 against references 1, 3 and 4.

NAVMC 1200.1D, FY19 Military Occupational Specialty Manual, Figure 4-1
1. Figure 4-1, printed p. 4-5, PDF p. 797, PRESENT MOS 0612 · source dated 2018 · cited by the explanation
PDF page 797 (opens in a new tab)
2.NAVMC 1200.1D, FY19 Military Occupational Specialty Manual, Figure 4-1 · event transcription · docs/legacy-data/usmc-mos-conversions.jsonl:147; Figure 4-1, printed p. 4-5, PDF p. 797, PRESENT MOS 0612
PDF page 797 (opens in a new tab)
3.NAVMC 1200.1D: FY19 enlisted conversion table legend · Figure 4-1 note, printed p. 4-14 / PDF p. 806 · cited by the explanation
PDF page 806 (opens in a new tab)
4.NAVMC 1200.1D: FY19 implementation conditions · Paragraphs 4001.1b, 4001.6 and 4002, printed pages 4-1 and 4-2 / PDF pages 793 and 794 · cited by the explanation
PDF page 793 (opens in a new tab)PDF page 794 (opens in a new tab)

Tactical Switching Operator (PMOS)

MOS 0612, Tactical Switching Operator, was split into conditional successor specialties 0631, 0671, 0639, and 0679. The listed grade range was private through gunnery sergeant.

The listed end date for 0612 is 1 October 2017. MARADMIN 490/17 was published on 31 August 2017, which is distinct from that change date.

The available record does not explain the conditions determining which successor applied to an individual Marine.

Source extraction notes

The cited source prints the MOS code but not its occupational title; no title was inferred. Raw table row; grade Pvt-GySgt. Destination set is conditional where multiple codes are listed.

Source documents (2)

Reviewed September 24, 2026 against references 1, 2 and 3.

MARADMIN 490/17, Reclassification of the Communications (06XX) Occupational Field
1. MARADMIN 490/17, para 3.e conversion table · source dated August 31, 2017 · cited by the explanation
Open source document (opens in a new tab)
3.MARADMIN 490/17, Reclassification of the Communications (06XX) Occupational Field · event transcription · docs/legacy-data/usmc-mos-conversions.jsonl:166; MARADMIN 490/17, para 3.e conversion table · cited by the explanation
Open source document (opens in a new tab)
NAVMC 1200.1C, FY18 Military Occupational Specialties Manual, 7 Apr 2017 (title source)
2. Figure 4-1, printed p. 4-4 / PDF p. 1007, PRESENT MOS 0612 title row · cited by the explanation
PDF page 1007 (opens in a new tab)

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.