Supervision of maintenance activities for phosphate transportation trucks: SCANIA, VOLVO and RENAULT. • Maintenance supervision for hydraulic loaders: CATERPILLAR, KAWASAKI, VOLVO and KOMATSU. • Planning periodic maintenance and repairs for engines, gearboxes and wheel axles according to mileage and operating hours. • Preparation of spare-parts requests and identification of required components. • Organization and supervision of maintenance teams, with testing and follow-up after maintenance operations.