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Per Diem Merchant Mariner Credential Jobs (NOW HIRING)

G&H Towing

Mariner

Brownsville, TX · On-site

$143.93 - $672.38/day

A Merchant Mariner Credential (MMC) with a medical certificate. * A Medical Certificate from the United States Coast Guard. How do I obtain the required documents? * TWIC: -industry/twic * MMC:

G&H Towing

Mariner

Corpus Christi, TX · On-site

$143.93 - $672.38/day

A Merchant Mariner Credential (MMC) with a medical certificate. * A Medical Certificate from the United States Coast Guard. How do I obtain the required documents? * TWIC: -industry/twic * MMC:

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Per Diem Merchant Mariner Credential information

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$5

$29

$41

How much do per diem merchant mariner credential jobs pay per hour?

As of Sep 5, 2026, the average hourly pay for per diem merchant mariner credential in the United States is $29.90, according to ZipRecruiter salary data. Most workers in this role earn between $26.92 and $31.97 per hour, depending on experience, location, and employer.

What can I do with a per diem merchant mariner credential?

A per diem merchant mariner credential allows individuals to work aboard commercial vessels in various roles such as deckhand, engineer, or mate, often on a per-diem basis. It certifies that the holder has met the necessary training and safety requirements to operate or assist on ships, and it is essential for employment in the maritime industry. The credential enables mariners to work in different environments, including cargo ships, tankers, and passenger vessels, often requiring ongoing training and compliance with maritime regulations.
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Per Diem Merchant Mariner Credential jobs near you
Infographic showing various Per Diem Merchant Mariner Credential job openings in the United States as of August 2026, with employment types broken down into 2% As Needed, 78% Full Time, 17% Part Time, 1% Temporary, and 2% Contract. Highlights an 94% Physical, 1% Hybrid, and 5% Remote job distribution, with an average salary of $62,195 per year, or $29.9 per hour.

Mariner Credentialing Assistant

United States Coast Guard - ABILITY Job Fair

Toledo, OH

$45K/yr

Full-time

Posted 10 days ago

Job description

This vacancy is for a GS - 0963 - 6/7, Mariner Credentialing Assistant located in the Department of Homeland Security, U.S. Coast Guard, REGIONAL EXAM CENTER-TOLEDO in TOLEDO, Ohio.Qualifications:

To qualify at the GS-06 grade level, your resume must demonstrate at least one (1) full year of specialized experience equivalent to at least the GS-05 grade level in the federal sector. Specialized experience is experience that has equipped you with the ability, skill, and knowledge to successfully perform the duties of this position and is typically in or related to this line of work. Examples of specialized experience include performing the following types of tasks on a regular basis.

  • Responding to inquiries from the public and/or government agencies through various channels like phone, email, and written correspondence to provide information and resolve issues related to credentialing
  • Using standard computer software to draft routine correspondence
  • Using data entry systems, such as the Merchant Mariner Licensing and Documentation (MMLD) system, to accurately record information
  • Applying state or federal laws, regulations, and policies


To qualify at the GS-07 grade level, your resume must demonstrate at least one (1) full year of specialized experience equivalent to at least the GS-06 grade level in the federal sector. Specialized experience is experience that has equipped you with the ability, skill, and knowledge to successfully perform the duties of this position and is typically in or related to this line of work. Examples of specialized experience include performing the following types of tasks on a regular basis.

  • Performing the initial review and processing of applications for various Coast Guard merchant mariner credentials, including deck and engine licenses, STCW endorsements, and certificates of registry
  • Responding to oral and written inquiries from the public and/or governmental agencies through office visits, telephone calls, electronic mail, and written correspondence
  • Drafting routine correspondence for a supervisor's signature regarding merchant mariner credentialing requirements using standard computer word-processing software
  • Applying a thorough knowledge of Federal Regulations (such as Title 46 CFR), statutes, and policies governing the issuance of U.S. Merchant Mariner's credentials to correctly and efficiently process applications
NOTE: All experience statements (i.e., duties, specialized experience, or related applicable assessment) copied from this announcement and pasted into your resume will not be considered as a demonstration of your qualifications for this position.
NOTE: Education cannot be substituted for experience at this grade level.
National Service Experience (i.e., volunteer experience): Experience refers to paid and unpaid experience, including volunteer work done through National Service programs (e.g., Peace Corps, AmeriCorps) and other organizations (e.g., professional, philanthropic, religious, spiritual, community, student, social). Volunteer work helps build critical competencies, knowledge, and skills and can provide valuable training and experience that translates directly to paid employment. You will receive credit for all qualifying experience, including volunteer experience.Education:This position does not have a positive education requirement. If you are including education on your resume, report only attendance and/or degrees from schools accredited by accrediting institutions recognized by the U.S. Department of Education. See Required Documents section for detail.
Only experience obtained by the closing date of this announcement will be considered.Employment Type: OTHER

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