Possible Clues:

• From the start, is a novice mechanic
• Old guild member
• Skilled worker's quietly taken off front of old weapon
• Worker guerrilla fighter quietly bumped off
• Mechanic in need of some part is angry
• Mechanic with skill I found in front of hospital
• Silversmith, e.g.
• Skilled worker at craft
• Craftsman has to settle back in woolly coat
• Technician's right one needed in upcoming space agency