Andrew joins from the Evening Standard where he has been a columnist and reporter since 2004.
In a release from TMG, Gilligan said: "The Telegraph is establishing itself as Britain's most important journalistic rainmaker. I want to be a part of that and I am very excited to be joining."
Ian MacGregor, Editor of The Sunday Telegraph, said: "I am delighted Andrew Gilligan is joining the Telegraph - he has a fantastic track record as one of the best investigative reporters in the country."
Related articles
- Mail bid to block anonymous Leveson witnesses refused
- Leveson inquiry 'not proportional', warns Andrew Gilligan
- Telegraph, Mail, Mirror and Sun agree to remove Beatrice images
- ABC: Mail site stays top but fails to escape June declines
- Secrets revealed after newspaper uncovers technical errors in MoD data
