GBST has appointed Robert De Dominicis as managing director and chief executive.
De Dominicis, who was previously interim chief executive, takes on the role on a permanent basis with immediate effect.
GBST chairman Dr John Puttick has also announced his retirement from the board of the company he founded in 1983.
Puttick says: “Under Robert’s leadership, GBST’s wealth management business has made outstanding progress, trebling sales in five years and achieving tremendous growth in the UK.
“He is very well placed to propel GBST further as it grows into a truly global company.”