Aitken joins from Bell Financial where he returned a year ago after his former fund management business - Aitken Investment Management - was sold in a management buyout.
GQG has emerged as the superior offer in a bid to acquire Pacific Current Group with a non-binding indicative offer of $11 per share but is yet to achieve the support of its largest shareholder.
Australian shares are gaining for the second straight session on Wednesday, with the benchmark S&P/ASX 200 moving above the 6,800 level, following the broadly positive cues from global markets overnight, with gains across most sectors led by mining and technology stocks.