Sir Brian Henry McGrath, GCVO, MW (27 October 1925 – 4 June 2016) was the Private Secretary to the Duke of Edinburgh.

From 1943 to 1946, he served in the Irish Guards, and after World War II, he joined Cannon Brewery from 1946 to 1948.

McGrath also held various directorships, including Grants of St James Ltd 1960 (chairman 1975–1982), Allied Breweries Ltd (now Allied-Lyon Plc) 1970–1982, and Broad Street Securities Ltd (chairman 1983–1991).

He retired as Treasurer in 1995, and in the following year was appointed Extra Equerry.

[2] McGrath was made a CVO in 1988, and advanced to KCVO in 1993, and GCVO in 2001.