A member of the prominent Halsey family of Hertfordshire, Halsey was educated at Eton and the Royal Agricultural College at Cirencester. He served as a Major in the Royal Green Jackets, and is a Fellow of the Royal Institution of Chartered Surveyors. He was High Sheriff of Hertfordshire in 1995. He married Viola Georgina Juliet Thorne on 7 August 1976. Their son is Guy Francis Johnston Halsey, born in 1981.
- High Sheriff of Hertfordshire: History Archived 9 September 2008 at the Wayback Machine at highsheriffofhertfordshire.org.uk
- High Sheriffs dated 16 March 1995, in The Independent online[dead link]
- Residents Say No to Land Grab at watfordobserver.co.uk
- In Fear of the Lord of the Manor[permanent dead link] at thisislocallondon.co.uk
- RFS: About Our People  visited 22 April 2015.
| High Sheriff of Hertfordshire
Robert Edward Dimsdale