Tieto supports a preventative approach to environmental challenges and a responsible way of conducting business operations. The company is included in several sustainability indices and has also been certified according to the ISO 14001 international standard on environmental management systems.

In 2016, Tieto renewed its commitment to the United Nations Global Compact (UNGC). The UNGC is a strategic policy initiative for businesses that are committed to aligning their operations and strategies with ten universally accepted principles in the areas of human rights, labour, environment and anti-corruption.

The management of Tieto's environmental impact mainly focuses on energy consumption (heating, cooling and electricity) for running data centres, offices and other facilities, and on business travel and the use of paper and other consumables.

In accordance with the company's environmental management system (EMS), a systematic method is used to identify and evaluate the main environmental aspects. Approximately 95% of the operations, including all major sites, are certified and within the EMS. The Environmental Rule states that employees are responsible for including environmental awareness and actions in their everyday work. Managers shall ensure that the policy is understood and acted upon within their organizations.

Tieto envisions a future in which information is the biggest driver of continuously increasing social and economic value. The company seeks a pivotal role in this change, and is committed to pursuing the opportunities of the data-driven world and supporting sustainable development. As one example, Tieto’s Industrial Internet start-up is engaged in long-term collaboration with HSB Living Lab, Sweden, to innovate IT solutions that enhance future living. 

The energy needed for running servers and computers in data centres, including the energy consumed for cooling, accounts for a large part of Tieto's total energy consumption and greenhouse gas emissions. Data centres represent around 30% of the company's total greenhouse gas emissions. Tieto works in a number of ways to improve energy efficiency in the data centres, e.g. by using virtualization and cloud-based solutions. In addition, the company is reusing energy by recycling excess heat from data centre servers to warm up buildings. This solution is currently in use in Tieto’s new-generation data centre in Espoo, Finland, where excess heat is fed back to the local district heating network. In Stockholm, a similar solution is used to warm up the office and nearby buildings.

To reduce greenhouse gas emissions and other environmental impacts, Tieto also aims to cut down travelling as much as possible. The company's travel policy encourages minimizing travel to internal meetings and favouring the use of digital tools such as video and teleconferences or live meetings. In addition, environmentally friendly travel options are to be chosen whenever possible.

To avoid environmental risks in the supply chain and reduce the environmental impacts from purchased goods and services, Tieto is continuing its dialogue with suppliers, subcontractors and partners. The aim is to ensure that they fulfil the high ethical and environmental requirements stated in the company's Supplier Code of Conduct Rule. This code is based on the UNGC and requires having an environmental management system equivalent to ISO 14001 or the Eco-Management and Audit Scheme (EMAS) in place.

As a result of the coordinated actions it has taken on climate change issues, Tieto was included in the Nordic Edition of CDP’s Climate Change Report 2016, in which it received a level B score, the second highest of five levels. The five levels in CDP’s scoring represent the steps on a company’s journey to being a good environmental steward.

Tieto published its seventh GRI-based Corporate Responsibility (CR) report in 2016. This report, including an overview of Tieto's environmental, social and economic performance during 2015, was prepared in accordance with the core option of the GRI G4 Reporting Guidelines. The report was externally assured in accordance with the International Standard on Assurance Engagements (ISAE) 3000 (Revised) “Assurance Engagements Other than Audits or Reviews of Historical Financial Information”. The CR report also represented the company’s annual Communication on Progress in accordance with United Nations Global Compact (GC) requirements, qualifying for the GC Advanced level.