Umesh Subramanian, Citadel's chief technology officer, is not interested in doing things in a "Citadel way." "The way we've done things so far— it's only a data point," Subramanian told Insider.

Québec City's Citadel (La Citadelle, in French) is the largest British-built fortress in North America; it took 30 years to construct. This military site has been active since 1850 when it housed ...