Born in Auckland on 26 December 1950, Edgar was educated at Mount Albert Grammar School and then the University of New South Wales.

[2] As a sculptor, Edgar worked chiefly in hard stone, and occasionally in other materials, such as glass or copper.

[4] In 2000, he designed McLeod's Crossing, a pedestrian bridge over the Oratia Stream in Falls Park, Henderson,[4][5] commissioned by Waitakere City Council.

[6] Another work, Lie of the Land, was installed in the Savill Garden, in Windsor Great Park in England, in 2012.

[10][11] Edgar was appointed an Officer of the New Zealand Order of Merit in the 2009 New Year Honours, for services to art, in particular sculpture.