Quality and Sustainability in our Products and Services

We ensure the quality of our products and services by adhering to international standards and recognised practices in quality management. These are incorporated into the way we conduct our work through the Integrated Management System (IMS).

As well as defining common working practices in our global operations, the IMS helps us track and manage risks and opportunities in all the projects we deliver to clients. By following a consistent approach, we ensure our high-quality standards are met. The IMS covers:

  • quality, health & safety and environment,

  • integrity,

  • business continuity,

  • knowledge management,

  • information security, data privacy,

  • and our business principles.

We are constantly developing our working practices and processes to further improve project quality and delivery for our clients which in turn helps us meet our business objectives. In 2022 we updated our project management, design and engineering processes. We integrated and harmonised service delivery processes across our five business lines to improve comparability and consistency of projects in different sectors. Our stakeholders benefit from our improved internal processes and enhanced serviced delivery.

Aligning with globally accepted international standards is important to us. Our IMS is therefore based on and certified against international standards on Quality management (ISO 9001), Environmental management (ISO 14001), Information management using building information modelling (ISO 19650), Anti-bribery management (ISO 37001), Compliance management (ISO 37301) and Occupational Health & Safety management (ISO 45001).

Renewing the validity of certifications is part of our ongoing work. In 2022, our Corporate Quality, Health, Safety and Environment(QHSE) department conducted internal QHSE audits in all our business lines and in 35 of our offices, supported by our global network of independent internal auditors. External QHSE audits were conducted by DNV in the Netherlands, Nigeria, Thailand, the United Kingdom and Vietnam. As a result of these audits, our ISO 9001:2015 (Quality), ISO 14001:2015 (Environment) and ISO 45001:2018 (Occupational Health and Safety) certificates were renewed to September 2025.

In 2022 external Integrity & Compliance audits in Mozambique, the Netherlands and Vietnam extending the validity of our ISO 37001:2016 (Anti-bribery) and ISO 37301:2021 (Compliance) certificates until November 2023.

We are also proud to have received the Gold rating from EcoVadis, the world’s largest and most trusted provider of business sustainability ratings, The EcoVadis assessment is an evaluation of how well a company has integrated the principles of Sustainability/CSR into their business and management system. The assessment includes environment, labour practices & human rights, fair business practices, anti-corruption and sustainable procurement. 

Client Satisfaction

Client satisfaction is an important indicator of our performance as a company. We measure this in various ways, including via satisfaction surveys on completion of a project. In the survey, clients provide us with a rating score for Enhancing Society Together. The majority of our clients rates us good or very good on the delivery of our brand promise Enhancing Society Together. In 2022, this resulted in an average Enhancing Society Together score of 7.5 on a scale from 0 to 10.

 Enhancing Society Together (EST) Score








Building Information Modelling

In 2022, we continued our certification against the requirements of the Building Information Modelling (BIM) capability and ISO 19650 in six countries. ISO 19650 is the international standard for managing digital information throughout the life cycle of built assets and construction projects of all sizes and levels of complexity. The certification demonstrates we can provide clients with better solutions, faster delivery times, improved risk management, better sustainability, and that we are committed to use a standard approach to define, create, validate, and share project information. 

All our global certificates can be viewed and downloaded from our website