His father Ernest Fearon Walker was a Scottish settler and worked for the Hedstrom and Hennings families managing a local trade store.

After attaining his Senior Cambridge, he was accepted into the University of Otago at Cantebury in New Zealand, receiving a BSc in Agricultural Science in 1948.

[3] After the 1987 coup, he served for a short stint as Interim Minister for Information[10][11] for the military junta before being appointed Fiji's Ambassador to the Empire of Japan in late 1988.

Walker resigned from all those positions after a strong disagreement with the SVT government led by Major General Sitiveni Rabuka, coup-maker cum elected Prime Minister.

[13] He also accepted board positions two private companies with BOC Gases and Golden Manufacturing Ltd. After the failed civilian overthrow of George Speight in 2000, he tendered his resignations for Fiji Pine and Tropik Wood Limited due to perceived conflicts with the new interim military administration's handling of these government subsidiaries.

After Parliamentary Democracy was restored in 2001, he accepted appointment as Chair of the Sugar Industry Restructuring Committee[14] by the leader of the SDL Government Prime Minister Laisenia Qarase.

Through his father he traced descent from the earliest European settlers including his namesake and grandfather Charles who settled in Fiji via Tonga and Canada and his uncle Leslie who was the colony's first Post Master General.