Teresa Cope has senior management experience in the NHS and has recently led the Isle of Man's care system.
Ms Cope has a medical background and trained as a Diagnostic Radiographer.
She has senior management experience in the NHS and most recently was CEO of Manx Care, the Isle of Man's care provider.
"‘Public service has been at the heart of my career, and I am excited by the opportunity to work with the Committee for Health & Social Care and colleagues delivering the wide range of health and care services the community relies upon.
"I am keen to get started, to listen and learn, and to help provide strong and stable leadership during this important period."
Health is Guernsey's biggest spending committee, with a budget this year of £260 million.
The interim Chief Officer post has been re-introduced by States Chief Exec Boley Smillie to improve accountability.
"‘Health and social care services are under increasing pressure, so securing someone with Teresa's experience is an important appointment for the organisation.
"HSC is one of the largest and most complex parts of the public service, with dedicated frontline staff.
"Teresa understands the realities of delivering services in an island community, and I'm confident she will provide the leadership.
"The organisation needs while offering strong support to the Health & Social Care Committee. I look forward to working with her."
Mr Smillie says Teresa Cope will also work closely with the political Health Committee.
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