Interested in our network infrastructure services?

Photo of a tier IV data center, supported by SIS Digital Networks
Photo showing an extremely tidy network/telecoms infrastructure installation by SIS Digital Networks


SIS Digital Networks designs, constructs and supports network infrastructure installations, however complex and labyrinthine.

Based in the UK, we are a leading turnkey network contractor working for major corporations, institutions, governments and public bodies.  Our ever-expanding list of customers confirms our status as the go-to solutions provider in the sector.

With experience spanning 25 years, SIS Digital Networks brings a flair for technological innovation to the process of creating effective and reliable networks in the most demanding of environments.

We undertake data, communications/telephony, VOIP, CCTV and videoconferencing installations – including point-to-point, wireless and satellite – using optical fibre and copper cable in internal and external environments.  We are experienced installers of third and fourth generation wireless technology (3G and 4G).

We have departments focused on network design, electrical installations and civil engineering – so you’ll always have the right specialists working on your project.

We are one of very few companies in this sector with a proven track record of successfully serving both public sector and commercial customers.  Of course, we also support our sister company, SIS Digital Media, in providing power and data connectivity for digital signage installations.

We pride ourselves on the strength of our relationships with suppliers and customers alike, and we have service partner status with nationally recognised organisations, including:
  • NG Bailey – for MOD network services and global connectivity
  • BAE Systems – for network design, installation and support.


SIS Digital Networks’ services include:

  • Network installations using copper cable – including Cat5, 5E, 6, 6A and 7, coaxial and CW1308
  • Network installations using fibre optic cable – single mode OS1 or OS2, plus multimode cables (OM2/OM3/OM4), etc.
  • Containment systems (trunking, conduits, baskets, trays, ladders, ducting) to meet any requirement
  • Electrical design and installation, with testing to the latest BS standards
  • Civil engineering – supporting OSP solutions with fully trained engineering teams
  • Specialist MOD installations, with in-house IDA support and fully compliant teams working to the latest JSP standards (JSP440/JSP640)
  • Engineering teams with active security clearance (SC/DV/BL)
  • Network evaluation using state-of-the-art Fluke test equipment
  • Support teams working to SLAs that will meet your every need.


SIS Digital Networks is a CHAS registered contractor, working to ISO9001 quality and ISO14001 environmental management standards.  Our engineering teams are trained under recognised bodies, including City & Guilds.

See also Vision Park.

Photo showing a technician splicing two optical fibres using a fusion splicing machine
Close-up photo showing well contained network cables connected to a patch panel in a data hub
Photo of a neat electrical containment installation by SIS Digital Networks

Want to learn more about SIS Digital Networks?