Grestax Engineering Service Excellence
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GRESTAX GROUP

Pioneering excellence in service delivery since 1990

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Building Excellence Since 1990

Grestax group is a dynamic and innovative engineering services and technology company founded with a vision to revolutionise and localize engineering services.

GRESTAX GROUP was founded in 1990 as a multi-disciplinary consultancy focused on Oil & Gas, construction, environmental, training and general contracting (GC) management company originating out of the oil city of Port Harcourt, Rivers State, Nigeria with our headquarters in Abuja, Nigeria and office in the United Kingdom.

Our subsidiaries include:

  • Grestax Engineering and Technology Limited.
  • Green and Blue Products Nig Limited.
  • Edgeworth Systems and Services Limited
  • Grestax Nigeria Limited.

Areas of Specialisation:

  • Consultancy and General Contracting
  • Engineering project management
  • Technology project management
  • Construction project management
  • Oil spill project management
  • Facilities management
  • Formal & informal energy sector training management
  • Infrastructure development management
  • Supply chain management (procurement & logistics)

0
Years
$1.5B+
EPC Value
$400M+
Services
Grestax Group Operations
1990
Established

Chairman & CEO

Guy Njoku ESQ.

Chairman & CEO

Guy Njoku ESQ.

RICS APMP M.Sc. Construction and Engineering Project Management Diploma in Information Technology Management and Programming B.Tech Geological Engineering

APMP certified engineering business management professional with over 20 years of experience across operations, sales, contracts, commercial, project controls, planning, procurement, engineering services, and execution.

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Executive Experience

Served notable global multinational organizations including Siemens, Baker Hughes & GE across Oil & Gas, Power Generation, and Healthcare Technologies.

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Proven Track Record

Managed over $1.5 billion in EPC deliverables and secured over $400 million in service revenues for multinationals and investors.

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Global Projects

Led major projects including Rotating equipments: BP Grangemouth Refinery, All BP platforms in the North Sea. Subsea Services: ENI Block 1506, Chevron Lianzi Angola/UK/Italy/US, Shell Bonga Main, ENI ABO, ExxonErha-Nigeria/UK. ENI OCTP- Ghana/UK. Healthcare equipments and services- West and central Africa.

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Education & Expertise

Executive Education in Supply Chain Excellence (USA), M.Sc. in Project Management (UK), Dip. in Information Technology Management and Technology (UK), and B.Tech in Geological Engineering (Nigeria).

Our Milestones

A legacy of innovation and strategic growth spanning over three decades

1990

Foundation

Grestax Nigeria Company Limited was established with a vision to revolutionize the Nigerian oil and gas industry through world-class systems and services.

1995

Regional Expansion

Extended operations across West Africa, establishing strategic partnerships with multinational corporations and government entities.

2000

Strategic Subsidiaries

Green and Blue products limited.

2010-2020

Major Projects & Partnerships

Successfully delivered major projects for Chevron, BP, Shell, Exxon, ENI, Baker Hughes, Siemens, and GE across Oil & Gas, Power, and Healthcare sectors.

2019-2021

Established Key subsidiaries

Edgeworth Systems and Services Limited.

2025

Sustainable Future

Grestax engineering and technology limited, Full lifecycle expertise >procurement> installations >field operations >training

Goals & Core Values

Our goals and objectives focus on the execution of capital projects and services, ensuring short-term cost reduction, medium to long-term profitability, empowering local workforce, and maintaining integrity to ensure return on our client investments.

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Excellence

Delivering the highest standards across operations, sales, project controls, and engineering services with proven results.

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Integrity

Building trust through transparency, ethical practices, and maintaining client investment integrity across all operations.

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Innovation

Aligned with global trends in cutting-edge technology and services solutions to bridge the EPIC & service gap across sectors.

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Sustainability

Environmental protection and sustainable practices drive our operational decisions for long-term prosperity.

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Safety

Unwavering commitment to health, safety, and environmental standards in every operation we undertake.

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Local Empowerment

Empowering local workforce through training, upskilling, and creating opportunities for economic growth.

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Our Vision

Long term focus & mission is in building world class systems with services/maintenance capabilities bridging the EPIC & services GAP across Oil/Gas, Power and critical Healthcare sector(s) in the West Africa region for economic growth & prosperity. Our goals & objectives are in the execution of capital projects & services, ensuring short term cost reduction, medium to long term profitability, empowering local workforce.

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Our Mission

We provide engineering, procurement, installation, field operations, and training services across developing countries, combining global standards with local execution. From marine and oil & gas operations to power generation, subsea installations, healthcare, renewable energy, and technology implementation, we deliver end-to-end solutions that are safe, reliable, and sustainable.

Areas of Expertise

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Value Proposition

Local excellence powered by global expertise

  • Focus on project execution and knowledge transfer
  • Best-in-class solutions
  • Sustainable practices
  • Client-centric approach
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Hydrocarbon Exploration

Commercial and technical field evaluation consultancy

  • Seismic data acquisition, processing and interpretation
  • Drilling and completion
  • Subsea and surface equipment and services
  • Well Intervention services
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Asset Development

Comprehensive installation engineering and solutions

  • Production optimisation and asset integrity
  • Decommissioning service
  • Installation engineering
  • Project management
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Marine Services

Complete marine operations and support

  • Offshore installations
  • Subsea operations
  • Marine logistics
  • Vessel management

Power Generation

Energy solutions for sustainable development

  • Turbomachinery services
  • Power plant installation
  • Maintenance and operations
  • Renewable energy integration
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Construction

Building infrastructure for the future

  • Facilities management
  • Building refurbishment
  • Erosion control
  • General contracting
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Healthcare

Medical equipment and technology solutions

  • Medical equipment procurement
  • Installation and commissioning
  • Maintenance services
  • Training and support
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Software Implementation

Technology solutions for modern operations

  • System integration
  • Process automation
  • Digital transformation
  • Technical support
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Training & Knowledge Transfer

Local excellence powered by global expertise

  • Oil & Gas training
  • Power generation courses
  • Healthcare services training
  • Technology implementation
  • Project management

Our Commitment

Dedicated to delivering world-class solutions that drive sustainable growth while maintaining the highest standards.

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Safety First

Highest safety standards in every operation.

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Innovation

Pushing boundaries with cutting-edge solutions.

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Sustainability

Environmental protection drives our decisions.

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Integrity

Building trust through transparency.