About us

GNJ Engineering Ltd. is a trusted Nigerian multi-service company delivering specialized solutions in facility management, corrosion control, tank cleaning and calibration, plumbing and installation, supply and procurement, civil works, and general contracts.

We serve industrial, Oil & gas,  agricultural, Hospitality and infrastructure sectors with tailored, high-quality services executed by skilled professionals. Renowned for reliability, efficiency, and customer-focused delivery, we combine technical expertise with operational integrity to ensure sustainable outcomes.

At GNJ Engineering Ltd., we deliver solutions built on integrity, excellence, and reliability.
Our services include:
Facility Management – Comprehensive building maintenance, infrastructure services, and utility support.
Corrosion Control – Protective solutions to extend the lifespan and performance of assets.
Tank Cleaning & Calibration – Professional cleaning and accurate volumetric calibration for safe operations.
Plumbing & Installation – Reliable plumbing systems and mechanical installations.
Supply & Procurement – Sourcing and delivering quality materials and equipment.
Civil Works & General Contracts – Construction, repairs, and project execution across sectors.