Le Cercle Intérimaire, a specialized recruitment agency in the industrial sector, is looking for a Heavy-Duty Vehicle Mechanic M/F in the 91 area. Responsibilities include: fine-tuning the engine, components, and equipment; conducting standard vehicle services; proactive maintenance for optimal function; diagnosing breakdowns as assigned by the workshop manager; creating cost estimates and invoices; performing maintenance operations, such as engine and gearbox oil changes, circuit purges, and wear checks; identifying faults which may be mechanical, electrical, or electronic. Must logically deduce dysfunction causes, listen and observe mechanisms, methodically organize intervention steps, strictly adhere to safety standards, and adapt to new technologies and models. Driver's license B required.