Mate Oceans 500 Tons or greater O/MUSV

Employer description

The Defense Sector at Leidos, supporting the Overlord Surface Vessel (O/MUSV) Program, is seeking a Mate with a USCG 500Tons Oceans or greater license with STCW certificates to support a dynamic high growth organization. The O/MUSV program is based in Port Hueneme, CA, and is responsible for delivering cutting edge autonomous vessel technology to the US Navy.  The program operates and maintains prototype autonomous vessels for test and evaluation of the vessels as well as developing operations, maintenance, logistics and training procedures for the autonomous Fleet of the future. 

The Mate will stand watch aboard O/MUSV vessels and will be responsible for navigation, security, cargo loading, vessel maintenance, safety programs, and SMS compliance under the supervision of the Master.  The Mate will travel and work onboard the USV at sea and in port, operating and maintaining the USV and support vessels.

Duties include standing up to 12 hour watches, supervising the loading and securing of cargo, maintaining vessel records, supporting logistics requirements, and conducting routine maintenance items. Will work rotating shifts of approximately 28 days, while on rotation crew should expect to work more than 40-hours per week.

Primary Responsibilities

Report to USV Master and Deputy Port Captain for pier side and afloat USV operations.

Participate in seamanship duties as required including small craft operation.

Assist in preparation, preservation, and cleanliness of assigned vessel, and any associated equipment.

Coordinate and assist in pre/post mission craft readiness functions.

May assist in vessel security and visitor control function.

Participate in Leidos and Government safety programs.

This position will require close cooperation and working relationships with active-duty military and other Government personnel.

Basic Qualifications

USCG Merchant Mariner credentials: 500tons or greater Mate Oceans with corresponding STCW certificate

USCG Medical Certificate

Position requires the ability to perform in an arduous duty environment.

High school diploma or equivalent

Ability to lift 40lbs

Individuals must possess the ability and demeanor to share common spaces over lengthy deployment periods and work closely with others in a small working area and in a shipboard environment

Must be able to communicate effectively

Must be a US Citizen

Must be able to gain access to US Navy bases

Preferred Qualifications

Experience working aboard US Government vessels

Towing Endorsement and experience working aboard tow vessels

STCW Proficiency in Fast Rescue Craft

If you’re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 — and moving faster than anyone else dares.

Original Posting:October 29, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.