Al Tayer has been leading DEWA since its inception in 1992. In June 2024, DEWA announced that it had achieved a 41.73% improvement in electricity and water production efficiency in 2023, compared to 2006. This is a cumulative reduction of 92.5 million tonnes of carbon dioxide emissions between 2006 and 2023, equivalent to planting 484 million trees to absorb this amount of CO2 emissions. Al Tayer is also the chairman of the ENOC Group, Dubal Holding, Dragon Oil Company, vice chairman of Emirates Global Aluminium, and the Dubai Supreme Council of Energy.