PDi Limited

Since its establishment in 2003, PDi has engineered projects, as well as provided quality engineering and project management support to the global oil and gas industry. PDi has been part of The Tattva Group since January 2016 and is continuing to augment its successful track record by growing across new regions.


PDi has expanded capabilities to offer multidisciplinary support through the lifecycle of oil and gas assets; from development to decommissioning, assisting a wide range of clients from integrated and national oil companies through to EPC companies and offshore contractors.


PDi’s subsea engineering capability spans the complete lifecycle of subsea infrastructure, from initial design to installation and operation. PDi’s strengths are evident in the execution of subsea projects, utilising a lean approach to ensure cost effective solutions.

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PDi has a successful track record of supporting both International and North Sea operations in all aspects of decommissioning. PDi has delivered decommissioning projects for more than 10 years, resulting in the development of its decommissioning expertise.

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PDi’s sectoral services in the subsea and decommissioning sector range from performance of ad-hoc scopes through to delivery of complete turn-key projects.

Project Engineering

PDi’s Project Engineering discipline comprises of highly experienced project engineers who can satisfy a wide variety of client requirements. These include discrete studies, tendering support, package management and project execution.

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Structural Engineering

PDi’s Structural Engineering team consists of a mix of topside and subsea experience gained through support provided to operators, EPC contractors and subsea installation companies. The Structural Engineering capability includes the detailed design of permanent and temporary structures as well as complex vessel integration scopes, platform and vessel surveys, rigging design and fabrication management.

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Pipeline Design & Analysis

PDi’s Pipeline Design & Analysis team has extensive experience in all aspects of pipeline design and deployment, installation and recovery analysis. In addition to their analytical expertise, the team also possess offshore experience, providing them with a realistic and operational perspective that benefits their work.

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Development and Process Engineering

In the recent years PDi has expanded its capability within Development and Process Engineering. Drawing on the extensive experience of its personnel, partners and deep knowledge of the sector’s needs, PDi is able to undertake a wide variety of process engineering and development related work.

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Specialist Engineering

PDi supplements its core engineering offering with specialist engineering capabilities in a number of key areas - Pre-Commissioning, Materials & Welding, Corrosion, Geotechnical, Valves, Controls, Survey, Marine and Lifting.

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