David Hennessy

David had been CTO for Three Ireland since 2008 and now leads a dual role in the Technology and Operations functions across both businesses, responsible for the network and IT systems.

David has more than 20 years’ telecommunications experience, having been responsible for Three Ireland’s radio network roll out following the acquisition of a 3G license in 2004.

In the UK, David focuses on delivering the £2bn+ investment in building the UK’s fastest 5G network, which is based on the UK’s largest 5G spectrum portfolio and recently acquired lower frequency spectrum, trebling Three’s spectrum holding.

At Three Ireland, David has driven the growth and strength of the network, overseeing an investment of over €700 million in Network & IT infrastructure in recent years including its recent deployment of 5G. This commitment has seen Three named as Ireland’s Speedtest Award™ Winner for fastest mobile network speed by Ookla.