His departure marks the latest change to the company's board, after a number of GPG veterans stepped down, including Tony Gibbs, Rob Langley, and Gary Weiss, and a batch of new blood was appointed, including Mike Allen, Rob Campbell and Mark Johnson. Johnson has since stepped down also.
GPG is in the process of winding itself down after several years of lacklustre performance from threadmaker Coats, its biggest holding.
The investment company overhauled its governance after a shareholder revolt last year, with Brierley stepping down as chairman in December, and Sydney-based Gary Weiss relinquishing his seat at the board in April.
New Zealand-based Tony Gibbs departed during the stoush after a boardroom showdown over the future of GPG, while the last of Brierley's lieutenant's, Blake Nixon, gave up his executive role in May.
The shares fell 0.7 per cent to 72.5 cents in trading today.