Prof Hugh Bryan Nisbet FRIC FRSE CBE DLit (1902–1969) was a Scottish chemist who served as the first Principal of Heriot-Watt University. He had a specialist knowledge of petroleum.

He was born in Edinburgh on 31 March 1902 the son of Robina Currie (née Cockburn, 1870-1949) and Hugh Bryan Nisbet (1870-1954), a clerk. The family lived at 3 Maurice Place, off Blackford Avenue, in south Edinburgh.^[1] He attended George Heriot's School then studied science at the University of Edinburgh graduating with a BSc, and continuing as a postgraduate to gain his first doctorate (PhD).

In 1921 he began as a Demonstrator in Chemistry at Heriot-Watt College. He was elected a Fellow of the Royal Institute of Chemistry in 1926.

He was elected a Fellow of the Royal Society of Edinburgh in 1940. His proposers were Thomas Slater Price, James Cameron Smail, James Pickering Kendall, William Ogilvy Kermack and James Sandilands. He served as Vice President to the Society 1955 to 1958.^[2]

In 1950 he became Principal of Heriot Watt College and when it received university status in 1966 he became its first Principal and Vice Chancellor. He was made a Commander of the Order of the British Empire (CBE) in the New Years Honours list of 1963.^[3]

He died at home in Edinburgh on 21 November 1969. He is buried with his parents in Morningside Cemetery, Edinburgh. The grave is toppled and lies in the south-west section. A memorial service was held in his memory in Greyfriars Kirk.

In 1929 he was married to Emily Murray Donmall (1900-1967). Following her death,in 1968 he married Flora Pellow (née Bigsby)(1908-1998).^[4]

His portrait by Alan Sutherland is held by Heriot-Watt University.^[5]