De Vidts, who has served in the financial markets since 1972, was one of the pioneers of the international and tri-party markets in the mid-1990s.
Haggart previously served as head of fund accounting, and prior to joining SS&C in March 2017 he spent almost nine years at EY in Luxembourg.
The appointment rounds off the global restructuring of HSBC's securities services leadership, following the appointment of two new global co-heads for the business.
Tom Carey previously led the combination of all of Broadridge’s international technology businesses into a single integrated unit earlier this year.
Margaret Law will be responsible for growing its regional client base and leading the adoption of CLS’s portfolio of products.
Angela Summonte has been appointed head of asset owner and official institutions sector solutions for EMEA at State Street, after 14 years with BNP Paribas.
Industry veteran Sabet Elias has been chief technology for sales and trading at Bank of America for the past seven years.
Deutsche Bank's GTB franchise is aiming to link its products with the wider investment bank and create synergies for North American clients.
The move is likely the first personal hire by Dan Houlihan in his new role running Northern Trust’s Americas asset servicing business.
Kate Birchall joins LCH from National Australia Bank, replacing previous region head Marcus Robinson.