Integrated Engineering, Construction, Environmental & IT Solutions across Nigeria and West Africa
Who We Are
Tresillian Group is a multidisciplinary Nigerian company delivering world-class engineering, construction, environmental, and information technology services. With a strong presence across Nigeria and West Africa, we combine technical expertise with local knowledge to deliver projects that meet international standards.
Our team of seasoned professionals brings decades of combined experience across oil & gas, infrastructure, environmental management, and digital transformation — making us a trusted partner for government agencies, multinationals, and private sector clients alike.
✓ Engineering & Infrastructure Solutions
✓ Environmental Consulting Services
✓ Oil & Gas Industry Support
✓ Information Technology Solutions
✓ Project Planning & Management
How We Work
Our Mission & Vision
01
Mission
To deliver innovative, sustainable, and high-quality engineering, environmental, and technology solutions that drive development and create lasting value for our clients and communities.
02
Vision
To become the leading integrated services company in West Africa, recognized for excellence, integrity, innovation, and transformative impact across every sector and community we serve.
03
Values
Integrity, innovation, safety, sustainability, and client-focused service guide every project we undertake, ensuring quality delivery, trusted partnerships, and long-term value for stakeholders and communities.
What We Do
Tresillian Group offers a comprehensive suite of services spanning five major practice areas, enabling us to serve as a single integrated partner for complex, multi-disciplinary projects.
ENGINEERING CONSTRUCTION
Civil, Structural and Mechanical Works
ENVIRONMENTALSERVICES
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.
Civil Works
Civil Works
Roads, bridges, drainage systems, and infrastructure development across urban and rural environments.
Structural Engineering
Structural Engineering
Industrial buildings, commercial facilities, and residential complexes designed to international codes.
M&E Works
M&E Works
Mechanical and electrical installations for industrial plants, commercial buildings, and public utilities.
Construction Capabilities
Road & Highway Works
Design, construction, and rehabilitation of roads, highways, and access routes for government and private clients.
Industrial Facilities
Warehouses, processing plants, and manufacturing facilities built to specification with rigorous quality control.
Water & Utilities
Water supply, treatment, and distribution infrastructure serving communities and industrial operations.
Ready to Start Your Next Project?
From environmental consulting to engineering and technology services, we deliver solutions that drive growth, sustainability, and long-term success.
✓ Professional Expertise
✓ Client-Focused Approach
Environmental Services
Tresillian’s environmental division provides comprehensive assessment, compliance, and remediation services. We help clients meet regulatory requirements while minimizing ecological impact and protecting communities.
Environmental Impact Assessment
Comprehensive EIA studies for infrastructure, industrial, and energy projects, ensuring full compliance with Nigerian regulations and internationally recognized environmental standards.
Remediation & Restoration
Professional soil and groundwater remediation, oil spill response, and ecosystem restoration services designed to rehabilitate contaminated sites effectively.
Waste Management
Integrated waste management solutions, including planning, hazardous waste handling, treatment, and environmentally responsible disposal for industrial operations.
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.
Regulatory Compliance
We guide clients through NESREA, DPR/NUPRC, and international environmental regulations, ensuring full compliance and avoiding costly penalties.
Environmental Auditing
We guide clients through NESREA, DPR/NUPRC, and international environmental regulations, ensuring full compliance and avoiding costly penalties.
Key Deliverables
✓ Environmental Impact Reports
✓ Environmental Management Strategies
✓ Baseline Environmental Assessments
✓ Pollution Prevention & Control Plans
Oil & Gas Services
With deep roots in Nigeria’s oil and gas sector, Tresillian provides specialized engineering, construction, and support services to upstream, midstream, and downstream operators across the Niger Delta and beyond.
Pipeline Engineering
Design, construction, inspection, and integrity management of oil and gas pipelines and flow lines.
Facilities Engineering
Engineering and construction of production facilities, flow stations, and processing plants.
HSE Services
Health, Safety & Environment management systems, audits, training, and emergency response planning.
Inspection & Testing
Non-destructive testing, corrosion monitoring, and asset integrity assessments for aging infrastructure.
Oil & Gas Project Lifecycle Support
CONCEPT & FEED
DETAILED DESIGN
CONSTRUCTION & INSTALLATION
OPERTIONS & MAINTENACE
Tresillian supports clients across the full project lifecycle — from early concept development through to long-term operations and maintenance — ensuring continuity, accountability, and technical excellence at every phase.
Information Technology
IT Solutions & Digital Transformation
Tresillian’s IT division delivers cutting-edge technology solutions that empower organizations to operate more efficiently, securely, and competitively. We bridge the gap between complex technical requirements and practical business outcomes across Nigeria and West Africa.
Networking & Infrastructure
Networking & Infrastructure
Enterprise network design, deployment, and management, including LAN, WAN, and wireless solutions.
Cybersecurity
Cybersecurity
Comprehensive security assessments, threat monitoring, firewall management, and incident response.
Cloud Services
Cloud Services
Cloud migration, infrastructure management, and hybrid cloud solutions for scalable operations.
Cloud migration, infrastructure management, and hybrid cloud solutions for scalable operations.
IT Expertise in Depth
IT Solutions
Digital Transformation
We help organizations modernize legacy systems, automate workflows, and adopt digital tools that drive productivity. From ERP implementations to business intelligence dashboards, our consultants deliver measurable results.
IT Project Management
Our certified project managers oversee technology deployments end-to-end, ensuring on-time, on-budget delivery with minimal disruption to ongoing operations.
Managed IT Services
Proactive monitoring, helpdesk support, and system administration services that keep your technology running at peak performance—24/7.
Data & Analytics
Business intelligence, data warehousing, and analytics solutions that turn raw data into actionable insights for smarter decision-making.
Tresillian’s IT team holds certifications in Cisco, Microsoft, CompTIA, and project management frameworks including PMP and PRINCE2.
IT Infrastructure & Connectivity
✵
Structured Cabling
Cat6/Cat6A, fiber optic, and data center cabling solutions designed for performance and future scalability.
✵
Data Center Solutions
Design and build of on-premise data centers with power, cooling, and redundancy systems to international standards.
✵
VSAT & Connectivity
Satellite and broadband connectivity solutions for remote sites, oil fields, and locations with limited terrestrial infrastructure.
Our HSE Commitment
Safety is non-negotiable at Tresillian. We maintain a zero-incident culture across all project sites, supported by rigorous training, regular audits, and a comprehensive HSE management system aligned with ISO 45001 and ISO 14001 standards.
HSE Services Offered
✓ HSE System Development & Implementation
✓ Risk Assessment & Hazard Analysis
✓ Safety Training & Workforce Development
✓ Emergency Preparedness Planning
✓ Incident Investigation & Reporting
✓ Site Safety Monitoring & Supervision
Project Management
Project Management Excellence
Tresillian’s project management professionals apply globally recognized methodologies—including PMI, PRINCE2, and agile frameworks—to deliver complex, multidisciplinary projects on time and within budget. We provide full project lifecycle management from initiation through closeout.
01
Portfolio Management
Scope definition, stakeholder alignment, risk assessment, and detailed project scheduling.
02
Execution & Monitoring
Resource coordination, progress tracking, quality assurance, and real-time reporting.
03
Closeout & Handover
Commissioning, documentation, lessons learned, and formal client handover.
Sustainability & Community Development
Tresillian is committed to sustainable development that balances economic growth with environmental stewardship and community well-being. We integrate sustainability principles into every project we deliver.
Environmental Stewardship
Minimizing ecological footprint through responsible construction practices, waste reduction, and biodiversity protection.
Community Engagement
Meaningful stakeholder consultation, local content development, and community investment programs on every project.
Local Capacity Building
Training, mentoring, and employing local talent to build lasting technical capacity within Nigerian communities.
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 Project
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.
Our Project
More Project Highlights
Commercial Building Projects
Structural design and construction of commercial office complexes and mixed-use developments in Lagos and Abuja.
Enterprise IT Deployments
End-to-end network infrastructure, cybersecurity, and managed IT services for corporate and government clients.
Water & Sanitation Works
Construction and rehabilitation of water treatment and distribution systems serving urban and peri-urban communities.
Our Track records
People & Expertise
Our greatest asset is our people. Tresillian’s multidisciplinary team includes registered engineers, environmental scientists, IT specialists, project managers, and HSE professionals—all committed to delivering excellence.
20+
Years Experience
100+
Projects Delivered
50
Professional Experts
Certifications & Accreditations
Professional Registrations
★ Council for the Regulation of Engineering in Nigeria (COREN)
★ Nigerian Society of Engineers (NSE)
★ Society of Environmental Engineers of Nigeria
★ Nigerian Institute of Management (NIM)
Standards & Compliance
★ ISO 9001 Quality Management Systems
★ ISO 14001 Environmental Management Standards
★ ISO 45001 Occupational Health & Safety Standards
★ PMP & PRINCE2 Project Management Certifications
★ Cisco, Microsoft & CompTIA Professional Certifications
Why Choose Tresillian?
Integrated Expertise
One company, five disciplines — eliminating coordination gaps and delivering seamless project execution.
Local Knowledge
Deep understanding of Nigeria’s regulatory environment, terrain, and business culture.
Proven Track Record
Over 100 successfully completed projects across diverse sectors and geographies in West Africa.
International Standards
All work delivered to globally recognized quality, safety, and environmental standards.
Our Client Commitment
Our Client Commitment
“We don’t just deliver projects — we build lasting partnerships grounded in trust, transparency, and technical excellence.”
Tresillian’s client-first philosophy means we invest time to understand your specific challenges, constraints, and goals before proposing solutions. We remain accountable from first engagement through final handover—and beyond.
Client-Focused
Solutions tailored to your unique requirements and business objectives.
Transparent
Clear communication, honest reporting, and no surprises throughout project delivery.
Quality-Driven
Rigorous QA/QC processes ensure every deliverable meets or exceeds specifications.
Certifications & Accreditations
Geographic Reach
Tresillian is headquartered in Nigeria with operational capability across all six geopolitical zones. We have successfully executed projects in the Niger Delta, South-West, North-Central, and South-East regions, and are actively expanding our footprint across West Africa.
Key Operational Areas
- Lagos — Commercial & IT Hub
- Abuja — Government & Infrastructure Projects
- Port Harcourt — Oil & Gas Operations
- Niger Delta — Environmental & Pipeline Works
- West Africa — Regional Expansion
Sectors by Region
Our multi-regional presence allows us to mobilize quickly, leverage local relationships, and deliver projects efficiently regardless of location or logistical complexity.
Active projects currently running across 5 Nigerian states and 2 West African countries.