“Reasonable and very experienced”
He is reasonable and very experienced and also has understanding of how international deals work. He can stand up and say how things are done.
Clients praise his negotiation skills and ‘broad experience in oil and gas’.
Sources appreciate his excellent client relationship skills, describing him as a "safe pair of hands."
Sergei Diyachenko is unanimously regarded as “a real star,” and attracts praise for his strategic and creative thinking, as well as his phenomenal knowledge of the sector.