Revenue: £80.2m (+12%)
Net profit: 4.2%
This Cisco Gold partner was set up in 1997 with the aim of managing the global IT needs of large customers, counting PwC as an early client. Based in London Bridge, it now has 26 global offices. For its year to 31 October 2017, NSC's UK arm saw revenue vault 12 per cent to £80.2m. Net profits shrank from £4.1m to £3.3m as it ate £3.9m in finance expenses resulting from foreign exchange losses.