Hydra's infiltration into S.H.I.E.L.D. came about through the appointment of Alexander Pierce as the Director of S.H.I.E.L.D. and a member of the World Security Council. Pierce leveraged his position to arrange the Scepter to be handed over to Hydra. Through the STRIKE team, Pierce was able to use S.H.I.E.L.D. as a vessel for Hydra's activities. These activities culminated into Project Insight, which was equipped with Zola's algorithm, and designed to target individuals who may pose a threat to Hydra. Steve Rogers exposed S.H.I.E.L.D.'s allegiance to Hydra and put an end to Project Insight.