PostTrade 360° 2025

3–4 Sept 2025 | Stockholm, Sweden

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Mack Gill

Head of Securities Processing

FIS

London, United Kingdom

1 profile visitSpeaker

I am responsible for the global securities processing business for FIS, which recently acquired Torstone Technology where I was COO.

My organisation

FIS

FIS

Company

United States

About me

Mack is Head of Securities Processing at FIS Capital Markets, responsible for driving FIS’ global post-trade solutions for the securities markets. Previously, he was COO & Board Member of Torstone Technology, a leading global SaaS platform for post-trade securities and derivatives processing, acquired by FIS. Before this Mack was CEO of MillenniumIT, a software subsidiary of the London Stock Exchange Group (LSEG), powering over 40 exchanges around the world.

Mack has been in the financial technology industry since 1994. In 2004 Mack became President of SunGard Technology Services, where he launched and developed SunGard’s software development and client services operations in Asia, scaling the business to over 3,000 employees in India, China, Tunisia, Europe and the US. Later, he also headed SunGard’s global consulting services business, managing over 1,000 consultants worldwide, and was then selected to manage SunGard’s global technology strategy & architecture. He joined MillenniumIT in 2013 as CEO.

From 2014 to 2017 Mack was identified as one of the top trading technology leaders in the financial services industry by Institutional Investor magazine. In 2018 Mack was named one of the “Top 25 FinTech Innovators” by Harrington Starr. Mack was chosen as a member of the Young Global Leaders, an affiliate of the World Economic Forum; and is a board member of the International Association for Quantitative Finance (IAQF).

Mack holds a B.A. from the University of British Columbia and a Master’s degree from Yale University.

My organisation

FIS is a financial technology company providing solutions to financial institutions, businesses, and developers.  We unlock financial technology to the world across the money lifecycle underpinning the world’s financial system.  Our people are dedicated to advancing the way the world pays, banks and invests, by helping our clients to confidently run, grow, and protect their businesses.  Our expertise comes from decades of experience helping financial institutions and businesses of all sizes adapt to meet the needs of their customers by harnessing where reliability meets innovation in financial technology. Headquartered in Jacksonville, Florida, FIS is a member of the Fortune 500® and the Standard & Poor’s 500® Index.

Speaker sessions (1)

Wednesday, 3 September 2025

11:00 - 11:40

Setting the scene: what’s known and done on T+1

Location:Room C3, Level 2
  • The T+1 track
  • Custody
  • Settlement