MMA-Machinists Mate, Non-Nuclear, Submarine Auxiliary

Rating Description


Machinist's Mate, Non-Nuclear, Submarine Auxiliary (MMA) operate, maintain, and repair (at the organizational and intermediate level) damage control equipment and systems, internal combustion diesel engines and diesel engine support systems, hydraulic systems, atmosphere control and oxygen-generating equipment, refrigeration systems, compressed air and gas systems, potable water system, seawater systems, and sanitary and plumbing systems.

For more detailed information, see the Rating Information Card.

There are 5 credentials closely related to the tasks performed in this Rating that may be attainable as soon as Class "A" technical school has been completed. Sailors can take advantage of these credentialing opportunities shortly following their initial training. Select "< 1 Year" for the "Experience after 'A' School" filter in the "Related Credentials" section to view these credentials.

MMA Jobs

Voluntary Education

In addition to obtaining certifications in your field, voluntary education is another way to enhance job performance. Options for voluntary education include:

For help in making informed choices on schools, education programs, and using tuition assistance, see:


You can use the Engage My Career Tool on MilGears to enter personalized information to learn about degree programs related to your training and experience and next steps towards pursuing a degree.

Navy Learning Center Recommended Degrees for MMA-Machinists Mate, Non-Nuclear, Submarine Auxiliary

The following occupational-related degrees are recommended by the Navy Learning Center and are listed in the Navy Learning and Development Roadmap (LaDR) for MMA.

You can use the Engage My Career Tool on MilGears to enter personalized information to learn about degree programs related to your training and experience and next steps towards pursuing a degree.


Recommended Associate Degrees

  • General and Liberal Studies
  • Industrial Management Technology
  • Management
  • Power Plant Technology
  • Quality Control and Safety

Recommended Bachelor/Master Degrees

  • General and Liberal Studies
  • Industrial Management Technology
  • Management
  • Power Plant Technology
  • Quality Control and Safety

Collateral Duty / Out of Rate Assignments

Navy collateral duties/out of rate assignments play a vital role in the day-to-day operations and duties that Officers and Enlisted Sailors perform. Certifications and licenses are also available in these collateral duties/out of rate assignments, so please go to the Collateral Duty/Out of Rate Assignments search feature (under the Navigator) and explore more opportunities to get certified.

Opportunities Related to Academic Degrees

Out of rate or designator requests for exam funding for credentials related to an earned academic degree or a semester course may also be funded if it can be directly related to an industry certification or state license.

For example, if you have a degree in Human Resources but are serving as a Culinary Specialist, you can get funding for a Professional in Human Resources (PHR) certification.

If the completed degree is not in the Sailor's Joint Service Transcript (JST), the Sailor must provide proof of completion with the Voucher Request Form, OPNAV 1500/57 for funding approval. The requested credential must be included on the Navy COOL website, and the Sailor must meet all other eligibility requirements.

As with any credential, you must meet all other eligibility criteria and the certification or license vendors' requirements.

Opportunities for Prior Rate or Designator Sailors

If you have cross-rated or redesignated, you now are eligible for certifications and licenses mapped to your prior rating or designator. The “Navy Bucks” icon on the Navy COOL page for your previous position/rate indicates which certifications and licenses may be funded.

As with any credential, you must meet all other eligibility criteria and the certification or license vendors' requirements.

Opportunities Related to Off-Duty or Command-Sponsored Training

If you can document that you have completed an on- or off-duty training course that fully prepares you for a civilian certification or license, you may now be eligible to have the credential exam funded.

For example, if you took a Command-sponsored Emergency Medical Technician course, you may be eligible for funding for an EMT Basic credential.

The requested credential must appear on Navy COOL, although it does not need to show the Navy Bucks icon to be funded.

College course completion must be annotated in your Joint Service Transcript. Formal off-duty or command-sponsored training should be visible in your Electronic Training Jacket (ETJ). In lieu of an ETJ entry (where training cannot be entered into the ETJ) you will need to submit some form of, proof of completion (a certificate of completion from the course/training is sufficient). If neither of the previously mentioned methods of validating proof of completion are available, then a command correspondence (such as a command letter, memo, or PG-13 form) describing the training along with the OPNAV 1500/57 Professional Certification and Licensing Voucher Request (COOL Voucher Request Form).

As with any credential, you must meet all other eligibility criteria and the certification or license vendors' requirements.

Opportunities for Navy Reservists

If you are a Navy Reservist, officer or enlisted, you may now be eligible for funding for credentials related to your civilian occupation. The certification or license must have relevance to the needs of the Navy, and must appear on Navy COOL, although it does not need to show the Navy Bucks icon to be funded.

To validate your civilian occupation, you will need a screen shot from Navy Standard Integrated Personnel System (NSIPS) showing the Civilian Occupational Code. Please send the NSIPS screenshot with your OPNAV 1500/57 Professional Certification and Licensing Voucher Request (COOL Voucher Request Form).

In lieu of NSIPS documentation you may also submit a command endorsed and executed NAVPERS 1070/613 (PG-13) Administrative Remarks form noting your civilian occupation along with your OPNAV 1500/57 Professional Certification and Licensing Voucher Request (COOL Voucher Request Form). You must sign the PG-13.

As with any credential, you must meet all other eligibility criteria and the certification or license vendors' requirements.

Prior Other-Service Occupation

If you are Navy (Active or Reserve), you may now be eligible for funding for credentials related to prior other-Service (Army, Air Force, Marine Corps, Coast Guard) occupation. The certification or license must have relevance to the needs of the Navy, and must appear on Navy COOL, although it does not need to show the Navy Bucks Navy Bucks icon icon to be funded.

To validate your prior other-Service occupation, you will need to provide Navy COOL with a document (e.g. DD-214; or Military Service School completion certificate; or other document) showing your other-Service occupation. Please send the document (scanned & emailed) with your OPNAV 1500/57 Professional Certification and Licensing Voucher Request (COOL Voucher Request Form).

As with any credential, you must meet all other eligibility criteria and the certification or license vendors' requirements.

Credentials Earned & Maintained Prior to Joining the Navy

If you are Navy (Active or Reserve), you may now be eligible for funding for credentials that were earned, and maintained, prior to entering the Navy. The certification or license must have relevance to the needs of the Navy, and must appear on Navy COOL, although it does not need to show the Navy Bucks Navy Bucks icon icon to be funded.

To validate your earned & maintained credential, you will need to provide Navy COOL with a scanned or emailed document (e.g. credential certificate document, screenshot from your credential dashboard, digital badge, etc…) showing the credential earned and maintained. Please send the document (scanned & emailed) with your OPNAV 1500/57 Professional Certification and Licensing Voucher Request (COOL Voucher Request Form).

As with any credential, you must meet all other eligibility criteria and the certification or license vendors' requirements.

E4

MMA  •  - ACTIVE DUTY/FTS


The September Active Duty E4 exams have been delayed. You can still view the references using these links:


The March 2020 SELRES E4 exams have been delayed. You can still view the references using these links:




E5

MMA  •  - ACTIVE DUTY/FTS


The September Active Duty E5 exams have been delayed. You can still view the references using these links:


The March 2020 SELRES E5 exams have been delayed. You can still view the references using these links:




E6

MMA  •  - ACTIVE DUTY/FTS


The September Active Duty E6 exams have been delayed. You can still view the references using these links:


The March 2020 SELRES E6 exams have been delayed. You can still view the references using these links:




E7

MMA  •  - ACTIVE DUTY/FTS




FREQUENTLY ASKED QUESTIONS

A BIBLIOGRAPHY is provided by the Navy Advancement Center (NAC) to document the REFERENCES used by a subject matter expert (a Navy Chief in the rating) as the basis for writing the items on the Active Duty and Reserve Navy Advancement Exams. If a reference has been updated since the exam was created and differs from the reference listed here, the information in the updated reference will be used as the basis for scoring the exam.

General Exam FAQs     Bibliography FAQs

INQUIRIES CONCERNING

Exam Development and Bibliographies
COM: (850) 473-6110
DSN: 753-6110
SFLY_EXAM_QUESTION@navy.mil

General Advancement Information
COM: (850) 473-6148
DSN: 753-6148
SFLY_NAVY_ADVANCEMEN@navy.mil

This is an official U.S. Navy websiteUpdated: January 07, 2021
Top

Click links below to view LaDR documents

This credential is recommended on the rating  LaDR for Sailors currently in the E-0 pay grade, BUT MAY BE TAKEN BY SAILORS IN OTHER PAY GRADES.

Click links below to view LaDR documents

This credential is recommended on the rating  LaDR for Sailors currently in the E-4 pay grade, BUT MAY BE TAKEN BY SAILORS IN OTHER PAY GRADES.

Click links below to view LaDR documents

This credential is recommended on the rating  LaDR for Sailors currently in the E-5 pay grade, BUT MAY BE TAKEN BY SAILORS IN OTHER PAY GRADES.

Click links below to view LaDR documents

This credential is recommended on the rating  LaDR for Sailors currently in the E-6 pay grade, BUT MAY BE TAKEN BY SAILORS IN OTHER PAY GRADES.

Click links below to view LaDR documents

LaDR documents are available as pay grade-specific or combined, covering all the pay grades in a rating.

Click here to go to Industrial Hydraulic Mechanic (IHM) COOL Snapshot page.

Renewal Period: 5 years

The International Fluid Power Society (IFPS), Industrial Hydraulic Mechanic (IHM) certification is for professionals in the fluid power and motion control industry who fabricate, assemble, test, maintain, and repair systems and components. IHMs understand hydraulic symbols, read system schematics, and are skilled in using hand tools, power tools, micrometers, and testing equipment. Candidates must pass both a written exam and a job performance exam.
Click here to go to Mobile Hydraulic Mechanic (MHM) COOL Snapshot page.

Renewal Period: 5 years

The International Fluid Power Society (IFPS), Mobile Hydraulic Mechanic (MHM) certification is for professionals in the fluid power and motion control industry who fabricate, assemble, test, maintain, and repair systems and components. MHMs understand hydraulic symbols, read system schematics, and are skilled in using hand tools, power tools, micrometers, and testing equipment. Candidates must pass a written exam and a job performance exam.
Click here to go to Certified Maintenance and Reliability Technician (CMRT) COOL Snapshot page.

Renewal Period: 3 years

The Society for Maintenance and Reliability Professionals (SMRP), Certified Maintenance and Reliability Technician (CMRT) is a certification for maintenance and reliability technicians who are responsible for preventative, predictive and corrective maintenance. CMRT candidates should possess aptitude in the following areas: maintenance practices, preventative and predictive maintenance, troubleshooting and analysis, and corrective maintenance. There are no experience or education eligibility requirements. Candidates must pass a written exam.
Click here to go to Electronic Diesel Engine Diagnosis Specialist (L2) COOL Snapshot page.

Renewal Period: 5 years

The National Institute for Automotive Service Excellence (ASE), Electronic Diesel Engine Diagnosis Specialist (L2) certification is for technicians who possess knowledge of the skills necessary to diagnose sophisticated diesel engine performance problems on medium- and heavy-duty trucks. Candidates must meet prerequisite and experience requirements. Candidates must pass a written exam.
Click here to go to Medium/Heavy Truck - Diesel Engines (T2) COOL Snapshot page.

Renewal Period: 5 years

The National Institute for Automotive Service Excellence (ASE), Medium/Heavy Truck - Diesel Engines (T2) certification is for individuals who possess knowledge and skills in engine brakes, general engine diagnosis, and the diagnosis and repair of the cylinder head, valve train, engine block, lubrication and cooling systems, air induction and exhaust systems, fuel system and starting and charging system. Candidates must meet experience requirements and pass a written exam.
Click here to go to School Bus Technician - Diesel Engines (S2) COOL Snapshot page.

Renewal Period: 5 years

The National Institute for Automotive Service Excellence (ASE), School Bus Technician - Diesel Engines (S2) certification is for technicians who possess knowledge and skills in general engine diagnosis, in-chassis engine inspection and repair, and the diagnosis and repair of lubrication and cooling systems, air induction and exhaust systems, the fuel system, and the starting system. Candidates must meet experience requirements and pass a written exam.
Click here to go to Diemaking Level III COOL Snapshot page.

The National Institute for Metalworking Skills (NIM), Diemaking III certification is a master level credential recommended for machinists with experience and skill in diemaking. The Diemaking Level III credential assesses a candidate’s knowledge, skills, and abilities with decision making and problem solving, written and oral communication, engineering drawings and sketches, metalworking theory and metal forming theory. Candidate is required to undergo a series of hands-on performance assessments as part of the credentialing process. Candidate must also pass a written exam.
Click here to go to Automobile/Light Truck - Light Vehicle Diesel Engines (A9) COOL Snapshot page.

Renewal Period: 5 years

The National Institute for Automotive Service Excellence (ASE), Automobile/Light Truck - Light Vehicle Diesel Engines (A9) certification is for Automobile and Light Truck (up to Class 3) technicians who can demonstrate knowledge of the skills necessary to diagnose, service, and repair cars, SUVs, and light duty trucks. Candidates must meet experience requirements and pass a written exam.
Click here to go to Transportation Worker Identification Credential (TWIC) COOL Snapshot page.

Renewal Period: 5 years

The Transportation Security Administration (TSA), Transportation Worker Identification Credential (TWIC), while not formally a license or certification in and of itself, is required by the Maritime Transportation Security Act for workers who need access to secure areas of the nation's maritime facilities and vessels. TSA conducts a security threat assessment (background check) to determine a person's eligibility and issues the credential. U.S. citizens and immigrants in certain immigration categories may apply for the credential.

In Demand

This certification is considered in demand. The U.S. Department of Labor sponsored CareerOneStop's analysis indicates the certification is frequently mentioned in online job postings.

Click for external link to CareerOneStop's Credentials Center.

Navy Bucks

Credential voucher or reimbursement for credential exam, re-certification, or maintenance fee has been approved for payment through the Navy's Credential Program Office. To get a voucher request form, click Menu at the top of any page, then click "2 Complete Voucher and Apply" under Credentialing Steps.

GI Bill®

Reimbursement for exam fees has been approved for payment through the GI Bill.

Note: GI Bill approval data is updated quarterly. For the latest information, visit the WEAMS Licenses/Certifications Search page. Make sure to select "Both" in the LAC Category Type drop-down before searching.

Click to go to the external link for GI Bill licensing and certification information.

Some

Credential is related to some tasks associated with the duties of the rating (at least one critical task but less than 80%)

Most

Credential is directly related to most of the major duties associated with the rating (at least 80%)

Other

Credential is related to this military occupation, but is more advanced or specialized and therefore will likely require additional education, training, or experience

High

Highly attainable: Credential is related to the duties performed within the military occupation, the minimum education requirement = HS or less and/or minimum experience = 2 years or less experience and no additional requirements.

Medium

Moderate ease of attainment: Credential is related to the duties performed within the military occupation, the minimum education requirement = Associate's and/or prerequisite and/or minimum experience = more than 2 years and less than 10 years of experience.

Low

May be difficult to attain: Credential is related to the duties performed within the military occupation, the minimum education requirement is a Bachelor's degree, and/or minimum experience is 10 or more years.

Most – Tasks in these careers match most duties of the military job or specialty (approximately 80% or greater)
Some – Tasks in these careers match some duties of the military job or specialty (greater than 20% but less than 80%)
Bright Outlook – new job opportunities are very likely in the future for this job

Registered Apprenticeship

An apprenticeship program is registered with the U.S. Department of Labor. Go to the Apprenticeship Finder and enter career path or location to find apprenticeship opportunities.

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Bright Outlook – new job opportunities are very likely in the future for this job

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This credential has been accredited by: