Adamson, who got the top UK PR job at HP following its merger with Compaq last year, leaves the group just weeks after seeing through the completion of its agency pitch process - a move which led to the appointment of Countrywide Porter Novelli (PRWeek, 31 January).
HP confirmed it is currently recruiting for a replacement head of UK corporate communications, but remained tight-lipped on whether the process would include external candidates and when an appointed was expected.
Adamson's successor will inherit a core team of three, reporting to HP UK and Ireland managing director and vice-president Steve Gill.
The post oversees corporate communications, investor relations, branding, internal and external PR.
In the interim, the role will be filled by externally retained agency CPN and the remaining PR heads, including PR manager Kate Winn.
As director of group corporate communications at LogicaCMG, Adamson will take on a similar brief to that at HP.
LogicaCMG - recently created by the merger of Logica and CMG - is in the process of reviewing its agency roster, which will affect at least four agencies (PRWeek, 7 March).
She said the review will be an immediate concern, but added that her remit is to lead the full gamut of PR and corporate communications, in charge of a team of around ten.
'The brief involves heading PR, internal comms, the extranet and intranet sites, publications, branding and annual reports,' said Adamson, who joined this week and reports to LogicaCMG chief finance officer Seamus Keating.
She left HP after three years, originally having joined Compaq pre-merger as head of corporate communications.
Prior to HP, Adamson worked as PR manager at PricewaterhouseCoopers' consulting arm, which was bought by IBM last year.