Mark is head of the IP and technology groups at London's Harbottle & Lewis, a firm specializing in the technology, media and entertainment sectors. Mark's practice emphasizes all aspects of the laws relating to on-line commerce and communication, in particular data protection and user privacy. Since Europe's moves towards harmonization of data protection laws began in earnest in 1998, Mark has advised numerous US and European businesses on how to collect, use and transfer data while keeping ahead of the advancing regulatory regimes. As well as being an English solicitor, Mark is a member of the California Bar, and before joining Harbottle & Lewis in 1998 was associated with Clifford Chance (London) and Brown & Bain (Palo Alto).