Mack Gill

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Mack Gill
Torstone Mack Gill.jpg
Occupation COO and Board Member
Employer Torstone Technology
Location London

Mack Gill is the chief operating officer of Torstone Technology, a provider of post-trade securities and derivatives processing. Before joining Torstone, he was most recently CEO of MillenniumIT, a subsidiary of London Stock Exchange Group (LSEG).


While at MillenniumIT, Gill established new client partnerships with exchanges and clearing houses around the world. Earlier, he had a long tenure as a senior executive of SunGard (now FIS), where he held a number of leadership roles including president of SunGard Technology Services, with responsibility for SunGard’s global technology strategy and consulting business.[1]



  1. Torstone Technology expands leadership team. Institutional Asset Manager.