[9][10] After completing a year long programme at the Royal College of Defence Studies, Cameron returned to DFID in 2011, where she was appointed director of the Middle East.

[1] Cameron was appointed chief executive officer of the National Cyber Security Centre in 2020, becoming the second person to hold such a position at the NCSC.

[16][17] In March 2021, during Cameron's inaugural address as CEO, she warned of the UK's need to "be clear-eyed about Chinese ambition in technological advancement", citing China's "hostile activity in cyberspace".

[21] In April 2024, it was announced that Cameron would replace Alexander Ellis as the High commissioner from the United Kingdom to the Republic of India that month.

[1] In July 2024, Lindy Cameron along with her husband Air Marshal Sean Reynolds attended Anant Ambani and Radhika Merchant wedding festivities.