CIARAN FLANAGAN
GREEN TECHNOLOGY AND SUSTAINABILITY
CIARAN FLANAGAN
TITLE: VP AND GLOBAL HEAD OF DATA CENTRE SOLUTIONS AND SERVICES
COMPANY: SIEMENS
INDUSTRY: TECHNOLOGY SOLUTIONS
LOCATION: DUBLIN, IRELAND
Ciaran leads Siemens’ multi‐billion‐Euro global data centre business, delivering electrification, software and cybersecurity solutions that automate operations, boost sustainability and prepare clients for the performance demands and opportunities of the AI era.
Facing smart grid challenges However, challenges remain in cybersecurity, data interoperability and scaling infrastructure to handle increasing decentralised energy resources and variable renewable inputs.
Siemens, for instance, recognises that the explosive growth in AI workloads is fundamentally changing the power and sustainability landscape for data centres. According to Ciaran Flanagan, Siemens’ Vice President and Global Head of Data Centre Solutions and Services, the industry is facing unprecedented challenges due to soaring power densities – some server racks now exceed 100kW – requiring a complete rethinking of power distribution, cooling and safety systems.
“ Time to power has become a critical bottleneck in the industry, especially when deploying new facilities,” he says.“ Grid connection backlogs are stretching into years, with many operators facing MW / GW-scale connection delays or outright rejections. In response, leading operators are taking control of their destiny by either developing on-site generation capabilities with microgrids or forming strategic partnerships with utility providers. At some point, data centres will become part of the grid ecosystem.”
190 September 2025