32. BJSS

Key points

Revenue: £116m (+39%)

Net profit: 19.5%

Staff: 775

This AWS and Azure partner claims to be the UK's largest privately owned IT and business consultancy. Revenues for its year to 30 April 2018 mushroomed 39 per cent to £116m, with net profits swelling at a similar rate to £22.6m. Founded in Leeds in 1996, BJSS' clients include Waitrose, and it is one of the largest suppliers on G-Cloud. Its core propositions include AI, digital transformation, modern managed service and journey to cloud.