Joe Russo

Joseph "Joe" Russo co-directed Captain America: The Winter Soldier with his brother Anthony. The brothers will also co-direct episodes 2 and 3 of Agent Carter and the future film Captain America 3. Russo also appeared in Captain America: The Winter Soldier in a cameo role of Nick Fury's S.H.I.E.L.D. Doctor.

Trivia
Joe Russo is the second MCU director to play a part in the film he is directing. The first was Jon Favreau, who portrayed Happy Hogan in Iron Man, Iron Man 2. He also played the character in Iron Man 3, which he didn't direct.