< The 2017 Tech 40

20. Alfred Spector
Chief Technology Officer
Two Sigma Investments
Last year: PNR

In hot pursuit of computer science and engineering graduates to help fulfill their fintech ambitions, top financial companies are often competing against the Silicon Valley allure of Apple, Facebook, and Google. None have scored a coup quite like Two Sigma Investments' October 2015 hire of Alfred Spector as chief technology officer. He joined the data-science-driven hedge fund firm after nearly eight years as Google's vice president of research and special initiatives. But Spector, 62, had an impressive career even before Google. He holds a Ph.D. in computer science from Stanford University and was a member of the IBM-Carnegie Mellon team that in the 1980s developed the Andrew File System, a highly scalable distributed file system and precursor of cloud storage, which won the Association of Computing Machinery's 2016 Software Systems Award. He proudly describes the honor as "a big deal in tech."

Two Sigma, founded in 2001 and with $45 billion in assets, is presenting new challenges to Spector. "It is an enormously interesting problem to use all manner of information with the goal of optimizing economic outcomes," he says. Outside the world of computing, 23 years ago he set a goal of running 25,000 miles — approximately equal to one time around the earth — within 25 years. At the time of a recent conversation he had 1,785 miles to go and was on schedule to finish early.

 
The 2017 Tech 40

1. Adena Friedman NASDAQ 2. Catherine Bessant Bank of America Corp. 3. Robert Goldstein BlackRock Fireside Chat- The New Credit Playbook: Convergence, Liquidity, and Innovation in Institutional Portfolios Sponsored by Nuveen June 17, 2025 4. Jeffrey Sprecher Intercontinental Exchange 5. Lance Uggla IHS Markit

6. Shawn Edwards & Vlad Kliatchko Bloomberg 7. David Craig Thomson Reuters 8. Michael Spencer NEX Group 9. Don Callahan Citigroup 10. Elisha Wiesel Goldman Sachs Group

11. Michael Bodson Depository Trust & Clearing Corp. 12. Terrence Duffy CME Group 13. Charles Li Hong Kong Exchanges and Clearing 14. Sean Belka Fidelity Investments 15. Chris Concannon CBOE Holdings

16. Guy Chiarello First Data Corp. 17. Steven Lieblich Citadel 18. David Rutter R3CEV 19. Blythe Masters Digital Asset Holdings 20. Alfred Spector Two Sigma Investments

21. Neil Katz D.E. Shaw Group 22. Lee Olesky Tradeweb Markets 23. Richard McVey MarketAxess Holdings 24. David Gledhill DBS Bank 25. Seth Merrin Liquidnet Holdings

26. Antoine Shagoury State Street Corp. 27. Peter Brown & Robert Mercer Renaissance Technologies 28. Lou Eccleston TMX Group 29. Peter Cherecwich Northern Trust Corp. 30. Mike Chinn S&P Global Market Intelligence

31. Chris Corrado London Stock Exchange Group 32. Neal Pawar AQR Capital Management 33. Gary Norcross Fidelity National Information Services 34. Steven O'Hanlon Numerix 35. Sebastián Ceria Axioma

36. Brian Conlon First Derivatives and Kx Systems 37. Tyler Kim MaplesFS 38. Michael Cooper BT Radianz 39. Robert Schifellite Broadridge Financial Solutions 40. Jim Minnick eVestment