Which type of certification often leads to the highest *immediate* wage increases due to validating scarce, hands-on skills?

Answer

Specialized technical certifications, such as welding

Technical certifications that validate scarce, hands-on skills, such as specific AWS welding certifications, often lead to the highest immediate return on investment in terms of hourly wage adjustments.

Which type of certification often leads to the highest *immediate* wage increases due to validating scarce, hands-on skills?
jobcareerManufacturingcertificationskill