Marine Corps 6122 Helicopter Power Plants Mechanic (T-58) to Civilian: Complete Career Transition Guide (2024-2025 Salary Data)

Bottom Line Up Front

Marine Corps 6122 Helicopter Power Plants Mechanics have turbine engine skills that civilian aviation pays well for. You inspected, removed, installed, tested, and repaired the General Electric T58 turboshaft engine and its fuel controls, gearboxes, and accessories at organizational and intermediate level. That is hands-on turboshaft/turbine engine maintenance, and it maps directly to the FAA Airframe & Powerplant (A&P) credential, engine overhaul shops, helicopter operators, and industrial gas turbine work. Realistic first-year civilian pay runs $45,000-$60,000 without a license, $65,000-$88,000 once you hold an A&P Powerplant rating, and $90,000-$120,000+ as a senior engine-shop tech or lead. The Bureau of Labor Statistics puts the May 2024 median for aircraft mechanics at $78,680, with the field ranging from about $47,000 to $107,000+. Your T58 background is real turbine experience, and the demand for engine techs is strong.

One note up front: the T58 and the CH-46 it powered are largely retired from Marine Corps service. Do not let that worry you. The engine is gone, but the skill set (turbine gas-path inspection, hot-section work, fuel control rigging, engine test) transfers fully to the T64, T700, PT6, CT7, and industrial turbines that civilian employers run every day.

Let's address the elephant in the room

You spent years turning wrenches on turbine engines. You can pull a hot section, troubleshoot a fuel control, run an engine on a test cell, and read a gas-path trend. Then you start reading civilian job postings and see "FAA A&P required" or "5+ years turbine experience preferred," and you wonder whether the T58 time even counts.

Here is the reality: your 6122 experience is exactly what engine shops and aircraft operators need. They just do not speak "MOS."

You did not just "work on helicopters." You:

• Inspected, removed, and installed turboshaft engines and quick engine change assemblies on multi-million-dollar aircraft
• Performed hot-section inspections, borescope inspections, and gas-path troubleshooting
• Rigged and adjusted fuel controls, power turbine governors, and bleed systems
• Diagnosed and repaired reduction gearboxes, accessory drives, and engine-mounted accessories
• Ran engines on test stands and interpreted torque, temperature, and RPM data
• Documented every maintenance action to strict airworthiness and traceability standards
• Followed technical manuals, service bulletins, and time-change component tracking

That is precision turbine engine work, safety discipline, and documentation accountability. Engine overhaul shops, airlines, helicopter operators, and power plants pay real money for it.

The challenge is not your qualifications. It is translating turbine engine experience into the civilian credential (the A&P Powerplant rating) and the language hiring managers understand.

Best civilian career paths for MOS 6122

Here are the fields where turbine engine mechanics land, with current salary data anchored to BLS.

Turbine engine overhaul and MRO technician (best match for your skill set)

Civilian job titles:

• Turbine Engine Mechanic
• Engine Overhaul Technician
• Powerplant Assembly Technician
• Engine Test Cell Operator
• Accessory/Component Overhaul Technician

Salary ranges:

• Entry engine-shop tech (no A&P): $45,000-$58,000
• Turbine tech with A&P Powerplant: $65,000-$88,000
• Experienced overhaul/test-cell tech: $80,000-$100,000
• Shop lead / cell lead: $95,000-$120,000+

Employers and industries:

• StandardAero (one of the largest independent engine MROs)
• Pratt & Whitney and Pratt & Whitney Canada
• GE Aerospace
• Honeywell Aerospace
• Rolls-Royce engine service centers
• Regional engine MRO and accessory shops

What translates directly:

• Turbine engine teardown, inspection, and reassembly
• Hot-section and gas-path work
• Fuel control and governor rigging
• Accessory and gearbox overhaul
• Engine test-cell operation and data interpretation
• Time-change tracking and airworthiness documentation

Certifications needed:

• FAA A&P (Powerplant rating at minimum) for most sign-off roles (see breakdown below)
• Manufacturer engine type training (GE, P&W, Honeywell, provided on the job)
• Sometimes only an A&P Powerplant, not full A&P, is required for a dedicated engine shop

Reality check:

This is the closest civilian mirror of your 6122 job. Engine shops overhaul turboshaft and turbofan engines all day, and they are chronically short of people who already understand hot sections, fuel controls, and test cells. Your T58 background is directly relevant even though the T58 itself is retired, because turbine architecture and troubleshooting logic carry over to the CT7, PT6, and larger engines these shops handle.

Some engine-only shops will hire you before you finish your A&P and pay for the exams while you work. The Powerplant rating alone (not the full airframe side) is often enough for dedicated engine work, which shortens your path.

Best for: 6122s who want to stay in engines specifically, like shop or test-cell environments, and want the fastest route to using their turbine experience.

FAA A&P aircraft mechanic (airlines, general aviation, corporate)

Civilian job titles:

• Aircraft Maintenance Technician (AMT)
• Powerplant Mechanic
• Line and Base Maintenance Mechanic
• Aircraft Engine Mechanic

Salary ranges:

• Entry AMT (with A&P): $55,000-$70,000
• Experienced A&P mechanic: $70,000-$90,000
• Senior/lead mechanic with overtime: $90,000-$110,000+
• Major airline top-of-scale: $100,000-$120,000+

Employers:

• Major airlines (Delta, United, American, Southwest, FedEx, UPS)
• Regional carriers (SkyWest, Republic, Endeavor, PSA)
• MRO facilities and repair stations (Part 145)
• Corporate and business aviation flight departments
• General aviation maintenance shops

What translates directly:

• Turbine engine inspection, removal, and installation
• Troubleshooting engine and fuel systems
• Technical manual and service bulletin compliance
• Functional testing and engine runs
• Maintenance documentation and logbook entries

Certifications needed:

• FAA A&P certificate (full Airframe and Powerplant for the broadest job market)
• FCC General Radiotelephone Operator License (GROL) only if you move into avionics work
• Aircraft/engine type training (provided by employer)

Reality check:

The A&P is the credential that unlocks the whole aviation maintenance market. BLS reports a May 2024 median of $78,680 for aircraft mechanics, with the field ranging from roughly $47,000 to $107,000+. Airlines have a well-documented mechanic shortage, and your turbine engine depth makes you a strong candidate for engine-focused line and base positions.

Your T58 powerplant experience most directly supports the Powerplant rating. To work the full aircraft, you add the Airframe rating. Many veterans qualify to sit for the exams through the experience route rather than a full school program (see the certifications section).

Best for: 6122s who want long-term aviation stability, strong benefits, and the flexibility to work anywhere aircraft are maintained.

Helicopter operator powerplant mechanic (EMS, offshore, utility, tourism)

Civilian job titles:

• Helicopter Mechanic
• Rotorcraft Powerplant Technician
• Field Maintenance Mechanic
• Base Mechanic (single-ship EMS bases)

Salary ranges:

• Entry helicopter mechanic: $55,000-$72,000
• Experienced A&P helicopter mechanic: $72,000-$92,000
• Lead / base mechanic: $85,000-$105,000
• Senior with overtime and remote pay: $95,000-$115,000+

Employers:

• EMS operators (Air Methods, PHI Air Medical, REACH, Med-Trans)
• Offshore oil and gas (Bristow, PHI, CHC)
• Utility and firefighting (Columbia Helicopters, Erickson)
• Tourism and charter operators

What translates directly:

• Turboshaft engine maintenance (the civilian fleet runs T700/CT7, PT6T, Arriel, and similar)
• Engine removal, installation, and hot-section work
• Fuel control and governor adjustment
• Working autonomously at small or remote bases

Certifications needed:

• FAA A&P certificate (required for most positions)
• Helicopter and engine type familiarization (provided)

Reality check:

Civilian helicopters run the same class of turboshaft engines you already know. EMS and offshore operators need mechanics who can keep a small fleet flying with minimal supervision, which is exactly how Marine flight-line maintenance trained you to work. Many EMS bases are single-mechanic operations near hospitals, and operators like autonomous, disciplined former military maintainers.

Pay is solid and the mission is meaningful. The tradeoff is that EMS bases are often in smaller cities, and offshore/utility work involves rotations and remote sites.

Best for: 6122s who want to stay on rotorcraft, like hands-on variety, and are open to smaller-city or remote assignments.

Industrial gas turbine technician (power generation, oil and gas)

Civilian job titles:

• Gas Turbine Technician
• Rotating Equipment Technician
• Field Service Technician (turbines)
• Power Plant Mechanic

Salary ranges:

• Entry gas turbine tech: $55,000-$70,000
• Experienced turbine tech: $70,000-$90,000
• Field service / outage specialist: $85,000-$110,000+
• Lead / senior field engineer: $95,000-$120,000+

Employers and industries:

• Power generation utilities and independent power producers
• GE Vernova, Siemens Energy, Solar Turbines (Caterpillar)
• Oil and gas (compression, pumping, LNG)
• Industrial turbine field-service companies

What translates directly:

• Gas turbine mechanical maintenance (many industrial turbines are aeroderivative, built from aircraft engine cores)
• Hot-section and combustion inspection
• Rotating equipment troubleshooting, alignment, and vibration awareness
• Reading trend data and following outage procedures

Certifications needed:

• No FAA A&P required for most industrial roles
• OSHA safety training, sometimes an NCCER or vendor turbine certification
• Manufacturer turbine training (provided)

Reality check:

Industrial gas turbines share DNA with the aircraft engines you maintained, and aeroderivative units (the LM2500 and LM6000 families, for example) are literally derived from aircraft engine cores. BLS-aligned pay for industrial gas turbine technicians commonly runs $70,000-$95,000, with field-service and outage specialists earning more for travel. This path does not require an A&P, so it is a fast option if you would rather not chase the certificate.

The tradeoff is travel and shift work, especially in field service, and less of the "aviation" identity if that matters to you.

Best for: 6122s who care more about turbine work and pay than about staying in aviation, and who do not want to invest time in an A&P.

Defense contractor engine and field-service technician

Civilian job titles:

• Aircraft Engine Mechanic (contractor)
• Field Service Representative (engine programs)
• Powerplant Technician (military aircraft support)
• Quality/Inspection Technician

Salary ranges:

• CONUS contractor engine mechanic: $65,000-$90,000
• OCONUS field service: $95,000-$130,000+
• Senior FSR / engine lead (deployed): $110,000-$140,000+

What translates directly:

• Turboshaft/turbine engine maintenance on military platforms
• Familiarity with military procedures and documentation
• Security clearance if you hold one (a real advantage)

Certifications needed:

• A&P preferred, sometimes not required for military engine contracts
• Active clearance is a strong plus
• Engine type quals you may already hold

Reality check:

Contractors that support military aviation need engine specialists, and your background lets you step in without hand-holding. OCONUS positions pay the most but involve long hours and deployments. Contract work is budget-dependent, but cleared engine techs stay in demand.

Best for: 6122s who want maximum near-term income, do not mind travel or deployment, and want to stay connected to military aviation.

Skills translation table

Stop writing "Helicopter Power Plants Mechanic, T-58" on your resume with no context. Civilians do not know what that means. Translate it.

Military Skill	Civilian Translation
T58 turboshaft engine maintenance	Inspected, removed, installed, and repaired turboshaft/turbine engines on multi-million-dollar aircraft
Hot-section and borescope inspection	Performed hot-section and borescope inspections; identified gas-path distress and corrective actions
Fuel control rigging and adjustment	Rigged and adjusted fuel controls, power turbine governors, and bleed systems to specification
Gearbox and accessory repair	Overhauled reduction gearboxes, accessory drives, and engine-mounted accessories
Engine test-cell operation	Operated engine test stands; interpreted torque, temperature, and RPM data to verify serviceability
QEC / engine change	Executed quick engine change assemblies and engine build-up to airworthiness standards
Technical manual compliance	Applied technical manuals, service bulletins, and time-change tracking to every maintenance action
Maintenance documentation	Maintained detailed, traceable maintenance and component records to airworthiness standards
Troubleshooting under pressure	Diagnosed complex engine and fuel-system malfunctions to restore mission-ready status
Training junior technicians	Trained and qualified junior technicians on turbine engine inspection and maintenance

Key resume terms to use:

• "Turbine/turboshaft engine maintenance" (this is your headline skill)
• "Hot-section inspection" and "borescope inspection" (standard industry terms)
• "Engine test cell" (recognized in every engine shop)
• "Fuel control rigging" (specific and credible)
• "Time-change component tracking" (shows you understand traceability)
• "Airworthiness standards" (military maintenance follows equivalent discipline)

Use numbers: "Maintained a fleet of 12 turbine-powered aircraft," "Completed 40+ hot-section inspections," "Achieved a 95% engine mission-capable rate," "Trained 10 junior turbine mechanics."

Drop the acronyms. Do not write "Performed IMC on T58 QEC per NAVAIR." Write "Performed intermediate-level maintenance and engine build-up on turboshaft engines per technical manuals."

Certifications that actually matter

Here is what is worth your time and GI Bill benefits.

High priority (get these first):

FAA Airframe & Powerplant (A&P) certificate

The single most valuable credential for turning your turbine experience into civilian pay. For engine work specifically, the Powerplant rating is the core, and many engine shops accept Powerplant alone. For the widest job market, get both ratings.

• Cost: roughly $1,000-$2,000 in test prep and exam fees if you qualify through experience, or $0 out of pocket using GI Bill at a Part 147 school
• Time: a few months if you test through the experience route, or 14-24 months at a Part 147 AMT school
• Value: required or strongly preferred for airline, MRO, and helicopter operator jobs; typically worth $15,000-$30,000 more per year
• Two routes:
  1. Experience route (14 CFR 65.77): with documented military aviation maintenance experience, you may qualify to take the FAA written, oral, and practical exams. This is evaluated through your local FSDO and the Joint Service Aviation Maintenance Technician Certification Council (JSAMTCC) process. It is not automatic or guaranteed credit; you must document your experience and be signed off to test.
  2. Part 147 AMT school: a guaranteed path if your documentation does not fully cover both ratings. GI Bill covers tuition and often pays a housing allowance while you attend.

Manufacturer engine type training

GE, Pratt & Whitney, Honeywell, and Rolls-Royce run engine-specific courses. You usually do not pay for these; an employer sends you once hired. They make you productive on a specific engine line fast.

• Cost: employer-funded in most cases
• Value: required to sign off specific engine models; raises your value inside a shop

Medium priority (after you land the first job):

FAA Inspection Authorization (IA)

Available three years after you hold your A&P. It lets you approve major repairs and perform annual inspections. Valuable if you move toward lead or inspector roles.

• Cost: low, plus biennial renewal
• Value: raises earning potential and opens inspector/lead paths

Associate's degree in Aviation Maintenance Technology

• Cost: $0 with GI Bill (plus housing allowance)
• Value: checks the degree box, can accelerate the A&P path if you attend a Part 147 program

NCCER or vendor turbine certification (industrial path only)

• Value: helps for power-generation and oil-and-gas turbine roles that do not use the A&P

Low priority (nice to have, not critical):

FCC General Radiotelephone Operator License (GROL)

Only useful if you move toward avionics or radio work. Your job is engines, so this is not a priority unless you pivot.

OSHA 10/30

Cheap and quick, useful for industrial and field-service safety expectations, but not a differentiator by itself.

The skills gap (what you need to learn)

Your turbine engine skills are strong. Here is what to close on the civilian side.

FAA regulations and civilian documentation: Military maintenance runs on NAVAIR instructions and the NAMP. Civilian aviation runs on 14 CFR (Part 43 maintenance, Part 91/121/135 operations, Part 145 repair stations) and manufacturer service bulletins. You learn most of this through A&P study and on-the-job exposure.

The full airframe side (if you want the whole A&P): Your depth is in powerplants. If you pursue the full A&P, you will study airframe structures, hydraulics, and systems you touched less as a dedicated engine mechanic. It is very learnable given your foundation.

Civilian engine fleet: You knew the T58. Civilian shops and operators run the CT7/T700, PT6, PW200, Arriel, and larger turbofans. The architecture and troubleshooting logic carry over; you are learning model specifics, not relearning turbines.

Customer and cost awareness: In the fleet, the goal was mission readiness. Civilian shops track billable hours, turn times, and warranty. Learn to explain engine status in plain terms and to work with turn-time and cost in mind.

Self-directed troubleshooting: The Marine Corps sent you to formal schools. Civilian employers expect you to pull the manual, the service bulletin, and vendor resources yourself. Build the habit of independent research.

Real 6122 success stories

Danny, 28, former 6122 Power Plants Mechanic to StandardAero engine overhaul tech

Danny spent five years on turboshaft engines and separated as a Sergeant. A regional engine MRO hired him into their overhaul line at $54,000 before he had his A&P, because he already understood hot sections and test cells. The shop paid for his Powerplant exam prep. Eighteen months in, with the rating in hand, he moved to $76,000 as an engine assembly and test technician. He says the turbine fundamentals were the same; he just had to learn the specific engine models and the paperwork.

Priya, 31, former 6122 Power Plants Mechanic to EMS helicopter mechanic

Priya got out after six years and used the experience route to sit for her A&P, testing through her local FSDO after documenting her engine maintenance time. She hired on with an EMS operator at a single-ship base at $71,000. After three years she runs the base largely on her own, handling engine and airframe work at $89,000, and likes the mission and the autonomy. She says her flight-line habits made the single-mechanic base feel normal.

Wes, 34, former 6122 Power Plants Mechanic to industrial gas turbine field-service tech

Wes did not want to chase an A&P. He took his turbine background to a power-generation field-service company and started at $68,000 working outages on aeroderivative turbines. The engines were bigger, but the hot-section and combustion work felt familiar. Four years later he is an outage specialist at $102,000 with travel pay. He banks the per diem and says the turbine skills, not the aircraft label, are what got him hired.

Action plan: your first 90 days out

Month 1: Documentation and foundation

Week 1-2:

• Get 10 copies of your DD-214
• Pull your training records and certificates (T58 course, any engine and intermediate-maintenance schools)
• Document your engine maintenance experience in detail: engines worked, hours, tasks (hot sections, test-cell runs, fuel control rigging, gearbox work)
• Contact your local FSDO and ask about A&P eligibility through the experience route (14 CFR 65.77 / JSAMTCC)
• File your VA disability claim if applicable
• Set up LinkedIn using civilian titles ("Turbine Engine Mechanic," not "6122")

Week 3-4:

• Build your resume with the translation table above (use the Military Transition Toolkit resume builder)
• Order A&P test prep (General, Airframe, Powerplant) if you plan to test through experience
• Research target employers: engine MROs (StandardAero, P&W, GE, Honeywell), helicopter operators, and industrial turbine companies

Month 2: Certifications and applications

Week 1-2:

• Begin A&P study, aiming for 90%+ on practice exams, or enroll in a Part 147 program with GI Bill if you need the school route
• Apply to engine shops and operators; many will hire you before the A&P is finished
• Connect with former Marine turbine mechanics on LinkedIn

Week 3-4:

• Sit for the General and Powerplant written exams if you are on the experience route (Powerplant first, since it matches your background)
• Attend veteran hiring events with 20+ resumes
• Consider a technical staffing agency (Aerotek, TEKsystems) for a first civilian engine role to build documented civilian time

Month 3: Interview and close

Week 1-4:

• Complete the oral and practical exam for your Powerplant rating (and Airframe if you are pursuing both)
• Practice interview answers built around specific engine accomplishments (hot sections completed, mission-capable rates, test-cell work)
• Tailor each resume to the posting (engine shop vs. operator vs. industrial)
• Follow up on applications after 1-2 weeks
• Join a professional group (Professional Aviation Maintenance Association) and, if you go industrial, connect with turbine field-service recruiters

Bottom line for 6122 Helicopter Power Plants Mechanics

Your MOS 6122 experience is turbine engine experience, and turbine engine experience is valuable. You inspected, tested, and repaired turboshaft engines, hot sections, fuel controls, and gearboxes to airworthiness standards. That is precisely what engine overhaul shops, airlines, helicopter operators, and power plants need.

The T58 and CH-46 may be retired, but the skill set is not. Turbine architecture, gas-path troubleshooting, and engine-run discipline carry straight over to the engines civilian employers run today.

Realistic expectations:

• First-year civilian income: $45K-$60K without a license, $65K-$88K with an A&P Powerplant rating
• Three-year income with experience and the rating: $75K-$95K
• Five-year income as a senior engine-shop tech, lead, or field specialist: $90K-$120K+

Engine MRO work is your closest match and often the fastest path to using your experience. The A&P opens the whole aviation market. Helicopter operators put you back on rotorcraft. Industrial gas turbines pay well without requiring an A&P at all.

Choose based on your priorities: engine focus (MRO), broad aviation stability (A&P and airlines), rotorcraft mission work (helicopter operators), or turbine pay without the certificate (industrial).

Your turbine skills, safety discipline, and documentation habits give you a real edge. Translate the experience, earn the credential that fits your path, and target employers who run the engines you already understand.

Pro tip: Start with the Powerplant rating first. It maps directly to your 6122 background, gets you working in an engine shop soonest, and you can add the Airframe rating later if you want the full A&P.

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Ready to build your transition plan? Use the career planning tools at Military Transition Toolkit to map your skills, research salaries, and track your certifications.

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Sources: Bureau of Labor Statistics, Aircraft and Avionics Equipment Mechanics and Technicians (OOH), BLS OEWS 49-3011, DoD COOL, O*NET OnLine