Welcome to Tresillian
Building Sustainable Solutions Through Expertise
Tresillian Group is a multidisciplinary Nigerian company delivering engineering, construction, environmental, and information technology services across Nigeria and West Africa. We combine technical excellence, industry experience, and local expertise to provide sustainable solutions that meet international standards. Our commitment to quality, innovation, and client success has made us a trusted partner for government institutions, multinational organizations, and private sector clients.
Industry-Leading Engineering & Technology Services
Commitment to Quality, Safety & Client Satisfaction
Experienced Professionals, Reliable Project Delivery
Innovative Solutions Tailored to Your Business Needs
Trusted Professionals
Why Clients Choose Tresillian Group
Delivering reliable engineering, environmental, and technology solutions with a focus on quality, safety, and long-term value.
20+
Years of Combined Experience
Providing professional services across multiple industries.with proven expertise and technical excellence.
100+
Projects Successfully Delivered
Executing projects efficiently while maintaining the highest standards of quality and compliance.
50%
Commitment to Client Satisfaction
Building lasting relationships through trusted partnerships, reliable delivery, and exceptional service.
Our Services
Our proven expertise and commitment to excellence have earned us a trusted reputation across engineering, environmental management, oil & gas operations, information technology, and project delivery sectors throughout Nigeria and West Africa.
ENGINEERING CONSTRUCTION
Civil, Structural and Mechanical Works
ENVIRONMENTAL SERVICES
EIA, Remediation and Waste Management
PROJECT MANAGEMENT
Planning, Supervision and Commissioning
OIL & GAS
Pipeline, Facilities and HSE
INFORMATION TECHNOLOGY
Software, Networking, Cybersecurity, Digital Transformation
Engineering & Construction
Engineering & Construction
Tresillian delivers end-to-end civil, structural, mechanical, and electrical engineering solutions. From feasibility studies and detailed design to full construction and commissioning, we manage every phase with precision and accountability.
Environmental Compliance & Auditing
Environmental Compliance & Auditing
We provide comprehensive environmental compliance and auditing services to help organizations meet regulatory requirements, minimize environmental risks, and maintain sustainable operational practices through regular assessments and expert guidance.
We guide clients through NESREA, DPR/NUPRC, and international environmental regulations, ensuring full compliance and avoiding costly penalties.
Industries We Serve
Tresillian’s integrated capabilities make us a versatile partner across a wide range of industries and sectors throughout Nigeria and West Africa.
Our Projects.
Selected Project Experience
Pipeline Integrity Projects
Engineering, inspection, and rehabilitation of oil and gas pipelines for major operators in the Niger Delta region.
Road Infrastructure
Design and construction of road networks and drainage systems for state government clients across multiple geopolitical zones.
Environmental Remediation
Soil and groundwater remediation projects for oil-impacted communities, restoring land to productive use.