You could join a technology consultancy firm like Accenture, PwC, CHP Consulting, LogicaCMG, BAE Systems, PA Consulting or Capgemini, or one of the global IT giants, such as Microsoft, Google, Oracle, Hewlett Packard, IBM, Cisco Systems and Apple, amongst many others.
There are a huge number of IT-focused UK companies, not to mention opportunities in investment, retail banking and financial computing and analytics (such as Goldman Sachs, Deloitte, J.P. Morgan, Morgan Stanley, Bank of England, Bank of America, HSBC, Barclays, RBS); telecommunications companies (such as BT, Vodafone, Orange, AT&T); IT for retail businesses (such as eBay, Amazon, Tesco, Argos, Expedia) and public sector organisations (such as NHS, GCHQ, Home Office).