Anne Keast-Butler will become the first female director of GCHQ, Foreign Secretary James Cleverly said.
She will succeed Sir Jeremy Fleming as the 17th director of the Cheltenham based intelligence agency.
Mr Cleverly said: “Anne Keast-Butler has an impressive track record? at the heart of the UK’s national security network, helping to counter threats posed by terrorists, cyber-criminals and malign foreign powers.
“She is the ideal candidate to lead GCHQ, and Anne will?use her vast experience to help keep the British public safe.”