Fergus was born in 1969 into a colonial family. He was sent to boarding school in Edinburgh and joined the army as a soldier at the age of eighteen after working in Switzerland, India, Spain, and Israel. Wiser heads advised him to go to University, where he studied philosophy and psychology. He was then commissioned in 1991 and served for a further twelve years.
He is married and lives in Yorkshire with his wife, Joanne, and a patterdale / collie cross called Lucy.
As a writer he is interested in the role of the state and how it affects the behaviour of individuals, searching out and dramatising the fractal relationship between the two.