Participating heavily in electrical system interruption investigations.• Investigated Maintenance, Inspections and Testing for Transformers to be with required quality levels: -- Insulation Resistance (IR) test.- Transformers Turns Ratio (TTR) test.- visual Inspection with check oil.- Replace LV CB- Cheak Gas SF6 and Fuse for RMU - Refill oil for transformer - Change step of Tap Changer • Correcting and Troubleshooting faults in RMU (Ring Main Unit) equipment and Transformers. • Carry out of inspection substations and RMU (Ring Main Unit) equipment by Partial Discharge (PD) device to predict fault before happened in terminations in all voltages level 33 & 13.8 KV.• Performing Current and Voltage Transformers test.• Good knowledge of Overhead Transmission Lines and Underground Cables.• Leading employee unit to improve them in their jobs and skills.