A journeyman pipefitter with 8 years of experience wants to maximize earning potential while remaining field-based rather than moving into management. Which career path typically offers the highest wage premium without requiring a supervisory role?
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A
Pursuing a Certified Welding Inspector (CWI) credential to qualify for shutdown/turnaround specialty work
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B
Obtaining a general contractor's license to bid small retrofit projects independently
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C
Completing an OSHA 30-hour card to qualify for safety officer per diem
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D
Cross-training as an HVAC technician to access residential service calls