What is the name of this character from The Blacklist?

do
2

I was watching Season 7 of The Blacklist on Netflix and then I found a character who speaks to Mr Reddingston but I have no idea who that character is or what his name is.

He appears around minute 3 of the 5 episode of season 7, here is a picture of him:

What is the name of this character from The Blacklist

Does anyone happen to know who that is?

Ju

My research led me to conclude that this should be an old friend of Reddington's. His name is Ilya Koslov and was a KGB agent.

The actor's name is Brett Cullen.

do

Thank you!