Microsoft has appointed an FBI special agent to take over the key role as chief security adviser in the UK, following a six-month search among senior security professionals.
Computer crime specialist Edward Gibson, who is also assistant legal attach‚ to the US embassy in London, will take over the high-profile post in July.
The chief security adviser will play a critical role in advising UK businesses on security issues and feeding back their concerns to Microsoft's Seattle headquarters.
Gibson has been responsible for establishing strategic alliances between UK police, the security services, private sector companies and the FBI since 2000.
"Ed brings to Microsoft a wealth of international experience in fighting crime and fraud, both within the public and financial sectors," said Nick McGrath, head of platform strategy at Microsoft.
Gibson takes over from Stuart Okin, who left Microsoft at the end of last year after eight years in the role. He has since taken a position with IT services firm Accenture.
One of Gibson's key roles will be to work with Microsoft's business managers to gain feedback from users on the firm's progress on security.
"Ed will help ensure that enterprises and public sector bodies more effectively integrate their security procedures, getting the most out of their investments in security technologies," said McGrath.
Microsoft has struggled to find a candidate for the job with both technical security expertise and the ability to act as a public face for the company.
McGrath said he had interviewed some of the most gifted security professionals in the UK before making the appointment.