Mohamed Abdelhameed Elhassan Mohameddein
Riyadh
Summary
Senior operations maintenance testing and commissioning engineer with over 14 years of experience in high- and medium-voltage substations up to 230kV. Expertise in GIS systems, protection schemes, and the testing, commissioning, and maintenance of transformers, switchgear, and cables. Proven track record of contributing to major Saudi Aramco projects while ensuring compliance with IEC and IEEE standards, HSE requirements, and operational reliability.
Overview
14
14
years of professional experience
1
1
Certification
Work History
Senior Testing & Commissioning Engineer
Advanced Technical Services (ATS)
Riyadh
01.2024 - Current
- Performed testing and commissioning of power transformers (230/13.8kV – 50MVA and 230/34.5kV – 80MVA) in compliance with IEC standards.
- Supported commissioning activities for major Saudi Aramco facilities.
- Conducted GIS testing for CTs, VTs, circuit breakers, disconnectors, and earthing switches to ensure system reliability.
- Executed CRM tests for GIS equipment to verify operational reliability.
- Performed scheme checks and functional testing for protection, control, LCC, RTCC, MCC panels to validate operational integrity.
- Carried out testing of AC/DC distribution boards and auxiliary systems.
- Tested surge arresters and insulators, including IR, tan delta, surge counter calibration to confirm compliance with performance standards.
Senior Operation & Maintenance Engineer
Sudanese Electricity Transmission Co. Ltd (SETCO)
Khartoum
03.2017 - 03.2024
- Executed testing and commissioning of substation equipment and protection systems, ensuring reliable operation.
- Operated and maintained HV/MV substations (220/110/66/33kV), including AIS and GIS systems.
- Performed preventive, corrective, and emergency maintenance for transformers, switchgear, and auxiliary systems.
- Conducted fault analysis and troubleshooting for HV network faults, resulting in reduced downtime.
- Coordinated with the Load Dispatch Center for switching operations and system restoration.
- Developed maintenance plans and schedules for substation equipment, enhancing operational readiness.
- Ensured compliance with HSE policies and IEC/IEEE standards.
- Analyzed and revised electrical drawings and schematics for accuracy.
Electrical O&M Engineer
Railway Power Stations
03.2014 - 03.2017
- Performed preventive and corrective maintenance on electrical systems, enhancing reliability and performance.
- Conducted fault analysis and troubleshooting to improve reliability.
- Ensured compliance with operational and safety standards to mitigate risks and uphold safety protocols.
- Operated and maintained railway power stations, ensuring uninterrupted power supply for operations.
Protection Engineer (Contract)
Sudanese Electricity Distribution Co. (SEDCO)
Sudan
03.2012 - 03.2014
- Developed and implemented protection schemes and relay coordination to enhance system safety.
- Conducted fault analysis and evaluated relay performance to optimise protection strategy.
- Executed protection relay testing, commissioning, and troubleshooting to ensure system reliability.
- Worked with ABB, Schneider MiCOM, and Siemens SIPROTEC relays.
Education
Bachelor’s Degree - Electrical Engineering
University of Alzaiem Alazhari
01-2011
Skills
- Testing & Commissioning of substation equipment
- Power transformer testing, commissioning, and maintenance
- Protection relay testing, configuration, and protection schemes
- MV/HV cable testing and troubleshooting
- Operation & Maintenance of HV/MV substations (AIS & GIS up to 230kV)
- High voltage safety
- Fault analysis and root cause analysis
- SCADA and control systems (basic knowledge)
- Equipment testing
- Team leadership and coordination
- Communication and problem-solving skills
- SCADA and control systems (basic knowledge)
- Team leadership and coordination
- Communication and problem-solving skills
Certification
- SEC Approved Testing & Commissioning Engineer, CSD ID No: ATS-007
- SCADA Systems Training
- AutoCAD Electrical Drawings
- ETAP – Power System Analysis
- Power Transformer Maintenance and Testing
Languages
Arabic
English
Custom Section
- Witnessed and approved Factory Acceptance Tests (FAT) for power transformers at BEST Transformer – Turkey.
- Represented SETCO in FAT activities at Siemens Energy – Germany.
Projects
- Saudi Aramco GCP Projects – Jafurah Field, Testing & Commissioning Engineer, Testing & Commissioning Engineer for Saudi Gas Compression Plants (230/34.5/13.8kV)., Performed testing and commissioning of HV/MV substation equipment., Configured and commissioned Siemens SIPROTEC 5 protection relays using DIGSI 5., Conducted SF6 gas testing and interlocking checks., Tested auxiliary relays and LV AC/DC systems., Contributed to the successful commissioning of six Gas Compression Plants.
- Dammam Airports Company (DACO) – Data Center Project, Testing & Commissioning Engineer, Performed transformer testing including TTR, winding resistance, and PI tests., Conducted RMU testing including IR, HiPot, relay, and circuit breaker tests., Executed MV cable and earthing system testing., Supported system integration for critical data center infrastructure.
- The Grand Mosque Expansion – Makkah, Testing & Commissioning Engineer (Team Leader), Led testing and commissioning activities for MV substations and transformers., Configured ABB relays using PCM600 software., Implemented and verified interlocking schemes., Conducted secondary injection testing for ACBs., Ensured compliance with project specifications and safety standards.
Timeline
Senior Testing & Commissioning Engineer
Advanced Technical Services (ATS)
01.2024 - Current
Senior Operation & Maintenance Engineer
Sudanese Electricity Transmission Co. Ltd (SETCO)
03.2017 - 03.2024
Electrical O&M Engineer
Railway Power Stations
03.2014 - 03.2017
Protection Engineer (Contract)
Sudanese Electricity Distribution Co. (SEDCO)
03.2012 - 03.2014
Bachelor’s Degree - Electrical Engineering
University of Alzaiem Alazhari