Jobs in Mississippi 2026 (Now Hiring) - Smart Auto Apply

Position: Senior Diesel & Heavy Equipment Mechanics 

Type: Full-time 

Location: Stennis, MS

Travel: 10% 

Contingent Upon Award

Position Summary: The Senior Diesel & Heavy Equipment Mechanic serves as a master mechanic responsible for diagnosing, repairing, and overseeing complex maintenance actions across NSW diesel, heavy equipment, and tactical vehicle fleets. This role performs the most technically demanding repairs and provides expert guidance and oversight to less experienced mechanics within the shop. The Senior Diesel & Heavy Equipment Mechanic ensures maintenance actions meet OEM, NAVFAC, and NSW standards while supporting high equipment availability and operational readiness. 

Duties and Responsibilities:  

• Perform advanced diagnostics and repairs on diesel and heavy equipment platforms  

• Repair and troubleshoot engines, drivetrains, suspension, braking, and hydraulic systems  

• Provide expert technical input on complex maintenance issues  

• Oversee and mentor junior and midlevel mechanics  

• Ensure maintenance quality and compliance with OEM and NAVFAC standards  

• Support inspections, audits, and readiness assessments  

• Operate Government vehicles during testing and repair activities  

• Document all labor, parts, and repairs in Fleet Focus 

Required Qualifications:  

• U.S. citizenship required 

• Ability to obtain installation access credentials  

• Ability to obtain and maintain a Secret clearance 

• Valid U.S. driver's license (Valid CDL preferred) 

• Minimum 6 years as an OEM, commercial fleet, or military diesel/heavy equipment mechanic (or E7–E8 equivalent military experience)

• Experience maintaining diesel engines over 400 HP and CESE platforms 

• Proficiency using Asset Works Fleet Focus 

• Ability to repair all tactical, expeditionary, and nontactical equipment in the shop 

• Experience providing technical oversight and mentorship 

• ASE Master Mechanic certification in Medium Heavy Trucks or Military Tactical Wheeled Vehicles (May be waived with 5 years as a depot level shop lead mechanic or supervisor) 

• Strong verbal and written communication skills  

• Compliance with hazardous material, safety, and facility access procedures  

• Compliance with drugfree workforce requirements 

• Ability to lift up to 75 pounds  

• Standing, bending, kneeling, climbing on vehicles and equipment  

• Work in motor pool, shop, and field environments  

• Exposure to noise, fuels, lubricants, exhaust, weather, and rugged terrain 

Physical Demands and Work Environment: While performing the duties of this position, the employee is regularly required to talk, listen, and write. The employee frequently is required to use foot/ankle motions, hands or fingers, handle or feel objects, tools, or controls. The employee is required to stand, walk, sit; and reach with hands and arms. The employee must occasionally lift and/or move up to 25 pounds. Specific vision abilities required by this position include close vision, distance vision, and the ability to adjust focus. The noise level in the work environment is usually moderate.  

The physical demands described here are representative of those that must be met by an employee to be the best qualified for the position and successfully perform the functions of the job. Reasonable accommodation may be made (if possible) to enable individuals with disabilities to perform the functions.  

Company Background: Seventh Dimension LLC provides focused customer support in two core competencies Training & Support Services. Since 2015, we have provided customers with flexible, adaptable, and creative approaches to solving complex problems. We are a proven prime contractor that understands future operating environments, fiscal constraints, and current force requirements. We are a SDVOSB in North Carolina with a TS Facility Clearance, Secret storage and a DCAA compliant accounting system. 

Disclaimer: This job description in no way states or implies that these are the only duties to be performed by the employee(s) incumbent in this position. Employees will be required to follow any other job-related instructions and to perform an3y other job-related duties requested by any person authorized to give instructions or assignments. All duties and responsibilities are essential functions and requirements and are subject to modification to reasonably accommodate individuals with disabilities. To perform this job successfully, the incumbents will possess the skills, aptitudes, and abilities to perform each duty proficiently. Some requirements may exclude individuals who pose a direct threat or significant risk to the health or safety of themselves or others. The requirements listed in this document are the minimum levels of knowledge, skills, or abilities. This document does not create an employment contract, implied or otherwise, other than an “at will” relationship. 

Seventh Dimension, LLC is a Veteran friendly employer and provides equal employment opportunity (EEO) to all employees and applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability status, genetic information, marital status, ancestry, protected veteran status, or any other characteristic protected by applicable federal, state, and local laws.