Responsibility for participation in corruption schemes during public procurement

I read news about how a scheme for embezzling state funds during procurement was exposed in the Izmail Sea Port, where group participants introduced discriminatory conditions into tenders and inflated prices. I am interested in what criminal liability may threaten people who participated in such schemes and embezzled budget money through shell companies? Also, is there a chance that their punishment could be mitigated if they admit guilt or cooperate with law enforcement?