MMN-Machinists Mate, Nuclear Power

Rating Description


Machinist's Mates, Nuclear Power (MMN) operate and maintain Naval Nuclear propulsion plants and associated equipment; supervise and administer naval nuclear propulsion plant operations; thoroughly understand reactor, electrical, and mechanical theory involved in the operation of the nuclear reactor, steam plant, propulsion plant, and auxiliary equipment; operate and repair systems associated with reactor plants, propulsion plants, and auxiliary support systems (e.g. air compressors, distilling plants, propulsion turbines, electric power generation turbines, shaft line components, air conditioning equipment, feed and condensate, steam, hydraulic, seawater systems, air, potable water, lubricating oil and oil purification, reactor auxiliary and support systems pumps, valves, and heat exchangers); perform tests, transfers, and inventories of lubricating oils, fuels, and water; and maintain records and reports on both surface and sub-surface ships. For more detailed information, see the Rating Information Card.

There are 4 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.

LaDR MMN-SS LaDR
LaDR MMN-SS-ELT LaDR
LaDR MMN-SW LaDR
LaDR MMN-SW-ELT LaDR

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 and education programs when using tuition assistance, see:

Navy Learning Center Recommended Degrees for MMN-Machinists Mate, Nuclear Power

The following occupational-related degrees are recommended by the Navy Learning Center and are listed in the Navy Learning and Development Roadmap (LaDR) for MMN-SS, MMN-SS-ELT, MMN-SW, MMN-SW-ELT.

Recommended Associate Degrees

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

Recommended Bachelor/Master Degrees

  • General and Liberal Studies
  • Industrial Management Technology
  • Management
  • Nuclear Power Technology
  • 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 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 Cross-Rated Sailors

If you have cross-rated, you now are eligible for certifications and licenses mapped to your prior rating. 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 it 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, 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 Enlisted Occupation

If you are Navy enlisted (Active or Reserve), you may now be eligible for funding for credentials related to prior other-Service (Army, Air Force, Marine Corps, Coast Guard) enlisted 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 enlisted (Active or Reserve), you may now be eligible for funding for credentials that were earned, and maintained, prior to your enlistment in 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.

E5

MMN  •  - ACTIVE DUTY/FTS




E6

MMN  •  - ACTIVE DUTY/FTS




E7

MMN  •  - 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: November 01, 2019
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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.

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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.

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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.

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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

This credential is recommended on the rating  LaDR for Sailors currently in the E-7 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 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 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 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 Registered Radiation Protection Technologist (RRPT) COOL Snapshot page.

Renewal Period: 5 years

National Registry of Radiation Protection Technologists, Registered Radiation Protection Technologist (RRPT) validates competency in fundamental and operational topics related to radiation protection. A Radiation Protection Technologist is a person engaged in providing radiation protection to the radiation worker, the general public, and the environment from the effects of ionizing radiation. They have basic understanding of the natural laws of ionizing radiation, the mechanism of radiation damage, methods of detection, and hazards assessment. They provide supervisory, administrative, and/or physical control, utilizing sound health physics principles in compliance with local and statutory requirements and accepted industry practices. This is a mid-level certification and requires applicants to hold a high school diploma or equivalent. In addition, the applicant must submit to the Board evidence of operational abilities as a Radiation Protection Technologists and have a minimum of five years of experience. Experience credit allowed for formal education, company training programs and applicable military training is cumulative up to a maximum of two years. Applicants must also pass a national examination.

Click here to go to Certified Control Systems Technician - Level I (CCST-I) COOL Snapshot page.

Renewal Period: 3 years

ISA's Certified Control Systems Technician Program (CCST) offers third-party recognition of technicians' knowledge and skills in automation and control. CCSTs calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. CCST certifications are available at three levels, and each level requires the successful completion of an examination. The CCST examination is only one requirement for certification. The candidate must also meet minimum requirements comprised of work experience and education.

Click here to go to Certified Manager (CM) COOL Snapshot page.

Renewal Period: 1 year

The Certified Manager (CM) is a general management certification. It is appropriate for supervisors, managers and leaders at all levels, in any industry, and benefits certificate recipients and their organizations. The CM program consists of 3 course modules of which each includes a study manual, online learning resources, practice exams and a certification exam. To earn the CM certification one must pass three certification exams. Successful completion of the CM exams is a reliable indicator that an individual possesses the skills that leaders and managers need. Eligibility for the CM certification is determined by a point system that considers both experience and education. A candidate must have at least 10 points including at least 3 Education points, and at least 4 Experience points. Candidates may count a maximum of 6 Education points and 7 Experience Points toward eligibility. Those who do not qualify for CM status may still participate in the CM program if they have met at least one of the minimum eligibility requirements. These individuals will earn Associate Certified Manager (ACM) status upon completion of the program. An ACM may earn full CM status through additional education and/or experience.

Click here to go to Certified Maintenance and Reliability Technician (CMRT) COOL Snapshot page.

Renewal Period: 3 years

The Certified Maintenance and Reliability Technician (CMRT) is an entry-level certification. CMRT will provide a non-biased, third-party, objective assessment and confirmation of the skills of your industrial maintenance mechanics. CMRT's are responsible for preventive, predictive, and corrective maintenance. They perform troubleshooting and analysis, and apply sound maintenance practices in all aspects of their work. CMRTs are multi-skilled individuals whose expertise is primarily mechanical in nature as opposed to instrumentation or electrical. The CMRT exam tests competency and knowledge of specific tasks within four (4) domains: Maintenance Practices, Preventative and Predictive Maintenance, Troubleshooting and Analysis, and Corrective Maintenance. There are no specific education or experience requirements to sit for the exam.

Click here to go to Certified Control Systems Technician - Level II (CCST-II) COOL Snapshot page.

Renewal Period: 3 years

ISA's Certified Control Systems Technician Program (CCST) offers third-party recognition of technicians' knowledge and skills in automation and control. CCSTs calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. CCST certifications are available at three levels, and each level requires the successful completion of an examination. The CCST examination is only one requirement for certification. The candidate must also meet minimum requirements comprised of work experience and education.

Click here to go to Certified Control Systems Technician - Level III (CCST-III) COOL Snapshot page.

Renewal Period: 3 years

ISA's Certified Control Systems Technician Program (CCST) offers third-party recognition of technicians' knowledge and skills in automation and control. CCSTs calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. CCST certifications are available at three levels, and each level requires the successful completion of an examination. To qualify to sit for the CCST examination, the candidate must have a minimum of 13 years of combined education, training, and/or experience.

Click here to go to Reliability Coordinator Operator Certification (RC) COOL Snapshot page.

The North American Electric Reliability Corporation (NERC), Reliability Coordinator System Operator Certification (RC) is an intermediate-level credential for professionals who operate bulk electric systems. System Operators monitor power flows, voltages and status of equipment on the transmission system, and ensure the safe and reliable operation of the bulk electric system. Candidates for the RC are expected to have knowledge of resource and demand balancing, transmission, emergency preparedness, contingency analysis and reliability, and managing communications and data.

Click here to go to Balancing, Interchange, and Transmission Operator Certification (BT) COOL Snapshot page.

Renewal Period: 3 years

The North American Electric Reliability Corporation (NERC), Balancing, Interchange, and Transmission System Operator Certification (BT) is an intermediate-level credential for professionals who operate bulk electric systems. System Operators monitor power flows, voltages and status of equipment on the transmission system, and ensure the safe and reliable operation of the bulk electric system. Candidates for the BT are expected to have knowledge of resource and demand balancing, transmission, emergency preparedness, contingency analysis and reliability, and managing communications and data.

Click here to go to Transmission Operator Certification (TO) COOL Snapshot page.

The North American Electric Reliability Corporation (NERC), Transmission System Operator Certification (TO) is an intermediate-level credential for professionals who operate bulk electric systems. System Operators monitor power flows, voltages and status of equipment on the transmission system, and ensure the safe and reliable operation of the bulk electric system. Candidates for the TO are expected to have knowledge of resource and demand balancing, transmission, emergency preparedness, contingency analysis and reliability, and managing communications and data.

Click here to go to Balancing and Interchange Operator Certification (BI) COOL Snapshot page.

The North American Electric Reliability Corporation (NERC), Balancing and Interchange Operator Certification (BI) is an intermediate-level credential for professionals who operate bulk electric systems. System Operators monitor power flows, voltages and status of equipment on the transmission system, and ensure the safe and reliable operation of the bulk electric system. Candidates for the BI are expected to have knowledge of resource and demand balancing, transmission, emergency preparedness, contingency analysis and reliability, and managing communications and data.

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.

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

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 here to go to external link GI Bill site.

ANSI

This credential has been accredited by ANSI. Click for external link to the ANSI web site.

ICAC

This credential has been accredited by ICAC. Click for external link to the ICAC web site.

NCCA

This credentialing program has been accredited by NCCA. Click for external link to the NCCA web site.

ABSNC

This credential has been accredited by ABSNC. Click for external link to the ABSNC web site.

IAS

This credential has been accredited by IAS. Click for external link to the IAS web site.

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 mimum 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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