"We are pivoting more into an investment and wealth provider rather than a full service digital bank," he said.
Goldman is shifting the focus of Marcus UK to wealth management to stay within UK banking rules which demand retail deposits totalling more than 25 billion pounds ($35 billion) be ring-fenced.
Reid, who was most recently head of corporate technology's engineering and architecture team, becomes the bank's first Black CIO and the first Black member of its technology leadership team.
In her role, Goldman will continue to lead a team developing technology for risk, compliance, finance, liquidity, controls and data functions.