IT infrastructure company BMC hired Golin Harris last March, ending a three-year relationship with Kaizo (PR Week 14 March 2007 ).
Waggener Edstrom was appointed without a competitive pitch, having worked on the software outfit's US business out of its American offices.
Golin Harris joint MD Jonathan Hughes called the move 'unsurprising', adding that his agency's split with BMC was amicable.
BMC's global comms head Mark Stouse said its comms spend would increase in the next fiscal year.
Waggener Edstrom will now handle all UK PR from its London office, led by newly appointed associate director Emma Richards, who joined the company last month from Red.
Richards and her team will report to senior manager EMEA analysts, press and executive communications Sarah Pocock, who works at BMC UK's Surrey headquarters.
'It was essential for us to find an agency that could demonstrate expertise in communicating not only complex technology stories, but the wider business issues affecting our customers,' said Pocock.
BMC turned over more than £750m in 2007, during which it acquired three IT start-ups. BMC's enterprise management software is used by 80 per cent of Fortune 500 companies, plus media-friendly international firms such as Tata Motors, builder of the world's cheapest car.
Other high profile clients include the US Department of Defense, which spends millions annually on BMC's IT systems.
BMC joins a technology roster at Waggener Edstrom that includes semiconductor heavyweights AMD, education technology outfit Promethean and long-term client Microsoft.