The Secret Intelligence Service, commonly referred to as SIS or MI6 (Military Intelligence, Section 6), is the British intelligence organization focused on international affairs.
Uzman was a member of MI6 before he left the organization and joined Sonny Burch's criminal group. During his service at MI6, he created a special reagent which make people more suggestible and responsive.
- In the non-canon video game Captain America: The Winter Soldier - The Official Game, R.A.I.D. member Shockwave is stated to be a former MI6 operative.