Careers Career Paths Marine Corps Tactical Switching Operator Job Description Share PINTEREST Email Print Lance Cpl. Corey Harris, a tactical switching operator with Detachment One, Communication Company, Combat Logistics Regiment 45, 4th Marine Logistics Group. U.S. Air Force/Getty Images Career Paths US Military Careers Technology Careers Sports Careers Sales Project Management Professional Writer Music Careers Media Legal Careers Government Careers Finance Careers Fiction Writing Careers Entertainment Careers Criminology Careers Book Publishing Aviation Animal Careers Advertising Learn More By Rod Powers Rod Powers Air Force NCO Academy Rod Powers was a retired Air Force First Sergeant with 22 years of active duty service. Learn about our Editorial Process Updated on 07/22/19 Tactical Switching Operators or Field Wiremen are the foundation of wire communications in the Marine Corps. MOS 0612 is the Tactical Switching Operator is a primary MOS (PMOS) and it has a rank range between Private to Sergeant. Understanding MOS Designation Codes Military Occupational Specialty codes (MOS) are used to designate job descriptions and duties within the Marine Corps. A series of numbers follow each MOS. The first two numbers identify the field of the job and the last numbers designate the job within that field. Several MOSs were renamed in 2016 to be less gender-specific, but the MOS 0612 title remained unchanged at that time. However, it was amended from just the Field Wireman position to include Tactical Switching Operator within the Communications field. Both terms are still used, and this position is sometimes informally referred to as "wire dog." Job Responsibilities for Tactical Switching Operators Personnel holding this designation construct, operate, and maintain wire networks to link key outposts, control points, and headquarters. They provide reliable paths for the transmission of telephone, facsimile, and digital data messages. Typical duties of this MOS include the installation of telephones and switchboards, and laying wire and cable. Tactical Switching Operators and Field Wiremen adjust equipment for proper operation. They recover wire, locate wire system faults, and operate switchboards. Marines in this position can obtain the additional skill of pole climbing if it's deemed necessary to perform wire functions. A complete listing of duties and tasks is available in NAVMC Directive 3500.106, Communications Training and Readiness Manual. Requirements to Become a Tactical Switching Operator Applicants for this job must possess an entry-level (EL) score of at least 105, and higher is preferred. Tactical Switching Operators and Field Wiremen must have normal color vision. They must be U.S. citizens and hold a confidential security clearance in addition to being eligible for a secret security clearance. Applicants for MOS 0612 must complete the Telephone Systems Installer Maintainer Course (TSIMC) at MCCES located in 29 Palms, California. The Telecommunications Supervisors course provides skill progression training for those holding ranks from Sergeant to Corporal. Related Department of Labor Occupation Codes The Marine Corps MOS 6012 equates to several other occupations in the Corps and in the private sector. Private sector occupations shown below include the Department of Labor Standard Occupational Classification (SOC) occupation code. Private Sector Station Installer and Repairer 822.261-022Line Installer-Repairer 822.381-014Line Installer and Repairers/Telephone Line 49-9052Telecommunications Systems Installers and Repairers, Except Line Installers 49-2022 Marine Corps Communications Jobs Construction Wireman MOS 0613Unit Level Circuit Switch (ULCS) Operator/Maintainer MOS 0614Electronic Switching Operator/Maintainer MOS 0618Wire Chief MOS 0619Radio Field Operation MOS 0621Digital (Multichannel) Wideband Transmission Equipment Operator MOS 0622SHF Satellite Communications Operator/Maintainer MOS 0627EHF Satellite Communications Operator/Maintainer MOS 0628 Radio Chief MOS 0629Strategic Spectrum Manager MOS 0648Data Network Specialist MOS 0651Tactical Data Network Gateway Systems Administrator MOS 0658Data Chief MOS 0659 Information Security Technician MOS 0681 Information Assurance Technician MOS 0689Communications Chief MOS 0699 The above information derived in part from MCBUL 1200, parts 2 and 3.