As I am writing down my CV, there is a part where I am saying that I can deal with pressure and there are proofs about it.
So, I would like to squeeze that information in one line. As a result a word for replacing:
Able to deal with pressure = 'one word'
If it helps, I am in Computer Science. Relevant question for football: Who excels under pressure?
Wish I could summon an Ancient Spartan, which would find the laconic way into this, without having to trouble you