Abdulazeez Saidu

Heavy Machinery Engineer with over 10 years of hands-on experience overhauling, maintaining, and repairing diesel engines, marine engines, and heavy construction equipment (bulldozers, excavators, loaders, graders, dumpers) across construction, oil & gas, and industrial sites. Skilled in preventive and predictive maintenance, hydraulic systems, fuel injection calibration, and OEM-standard reconditioning of major engine brands including CAT, MAK, Cummins, and Hyundai Himsen. Proven record of leading maintenance activities safely and in full compliance with HSE and quality standards, while collaborating effectively with OEM engineering teams and multifunctional site crews.

Mechanical Engineer at Rocad Construction Limited (2025-02 – Present)

• Overhaul diesel engines powering heavy construction machinery, including full inspection and rebuild of critical components.
• Verify engine oil, coolant, and fuel-system integrity; drain moisture/sediment from filters and water separators to prevent equipment downtime.
• Inspect air cleaner restriction indicators, drive belts, and turbocharger bearings/compressor wheels for wear and early fault detection.
• Change engine oil, full-flow and by-pass oil filters, and fuel filters on schedule to sustain equipment reliability.
• Clean/replace crankcase breathers and set valve clearances and injector adjustments to ensure proper combustion efficiency.
• Descale and flush cooling systems, inspect vibration dampers and water pumps to maintain safe operating temperatures.

Mechanical Engineer at Dangote Petroleum Refinery & Petrochemicals (2020-01 – 2025-02)

• Performed preventive maintenance on lube oil filter systems, dual fuel filters, pre-lubrication pumps, cooling water pumps, and reciprocating compressors.
• Executed corrective maintenance including cylinder head reconditioning, cylinder liner replacement, and injection nozzle calibration on CAT 16CM43C MAK (12.5MW) engines to OEM standards.
• Carried out crankshaft web deflection checks using precision gauges to verify alignment and balance.
• Operated peak pressure devices at full engine capacity to evaluate performance and efficiency.
• Collaborated with OEM engineering teams to commission MAN AG100/11R compressors, Hyundai Himsen 12H32/40V and 6H21/32 engines.
• Delivered preventive and predictive maintenance across a heavy engine fleet: CAT 16CM43C MAK (marine), Hyundai Himsen 12H32/40V (5.5MW), Hyundai Himsen 6H21/32 (1MW), CAT C32 (1MW), and Cummins (750KW) units.
• Maintained Cummins C1500 D5P K50 series 12×1500KVA generator sets, including full cylinder head reconditioning.
• Ensured all site activities complied with Health, Safety, Environmental, and Quality standards.

Auto Mechanical Engineer at Shemomal Nigeria Limited (2019-05 – 2019-12)

• Carried out general maintenance and repair of heavy-duty diesel equipment, including full engine overhauls and hydraulic cylinder replacement.
• Serviced and maintained 350KVA diesel generators.

Youth Corper / Lecturer Assistant at The Federal Polytechnic Ilaro, Dept. of Mechanical Engineering (2018-04 – 2019-03)

• Prepared lecture materials and delivered instruction in Basic Workshop Technology & Practice (MEC 113) and Engineering Measurement (MEC 212).

Technician at Roots Equipment & Material Limited (2015-06 – 2015-12)

• Inspected all equipment parts prior to customer delivery and provided after-sale servicing on Atlas Copco and Case construction equipment.
• Performed oil, oil filter, and fuel filter changes; repaired nozzles and injector pumps on diesel machinery.
• Maintained 100KVA Perkins and 250KVA CAT generator sets.

Foreman at China Civil Engineering Construction Company (2014-02 – 2014-12)

• Directed general maintenance and overhaul of diesel generators and heavy trucks (Sinotruck) and construction equipment (Sany, Shantui, Liugong).
• Led piston, piston ring, cylinder liner, connecting rod bearing, and crankshaft bearing repairs.
• Oversaw gear box and truck axle removal, repair, and replacement, plus injector pump servicing.

SIWES Student at Julius Berger Nigeria Plc — CAT Workshop (2012-10 – 2013-03)

• Repaired and serviced heavy construction machinery including dumpers, tractors, bulldozers, wheel loaders, forklifts, skid loaders, and graders.

Apprentice Technician at Exmas Winners Resources Limited (2005-09 – 2010-10)

• Overhauled diesel truck engines (DAF, Iveco, MAN, Mercedes, Renault); replaced brake pads, clutch plates, and springs.
• Removed and replaced U-bolts, center bolts, injector pumps, and truck axles.

Bachelor of Engineering in Mechanical Engineering – The Federal University Oye-Ekiti, Ekiti State (2025)

Higher National Diploma (HND) in Mechanical Engineering Technology – The Federal Polytechnic Nasarawa (2017)

National Diploma (ND) in Mechanical Engineering Technology – The Federal Polytechnic Nasarawa (2014)