Within the MCU, Martin Freeman’s Everett Ross first served as the Deputy Task Force Commander of the Joint Counterterrorism Center in Captain America: Civil War, reporting directly to U.S. Secretary of State Thaddeus “Thunderbolt” Ross. Everett worked alongside Tony Stark to apprehend Bucky Barnes after he was framed for the United Nations bombing, and when Helmut Zemo, the true perpetrator, was later captured, Everett oversaw his incarceration.
Article source: https://www.cinemablend.com/news/2478225/black-panther-2-expected-to-bring-back-one-key-supporting-character