ICT stands for Information and Communications Technology
The type of systems that fall into this category are: Voice/Data/Audio/Video Technologies, Electronic Safety & Security, All Fiber- and Copper-Based Distribution Systems and Infrastructure, Wireless Networks, Data Center Design, Outside Plant Cabling, and Design, Integration & Installation of Telecommunications Distributions.
ICT contractors and professionals are trained and certified in the installation, design and project management of such systems respectively. Generally certified ICT contractors and professionals are required to maintain certification, accreditation or licensing through continuing education.
See for example the Fiber Optic Association or BICSI.