Boris is a former Soviet soldier in the USSR before its fall. He had participated in the Soviet's invasion of Afghanistan. After the Soviet Union fell he ran wild on the battlefield, later on he regretted it and felt shame for what he did. After he was discharged he began work for various PMCs.
Formation of Maverick Security Consulting Inc.Edit
Boris had been acquaintanced with Raiden since the latter had saved Sunny, granddaughter of his late friend Sergei Gurlukovich. Besides his friendship with Gurlukovich, he also was aware of the threat of the Patriots to the world, not just to America, so he was more than eager to aid Raiden. After the events of Liquid Ocelot's Insurrection against the Patriots in 2014, Boris founded Maverick along with several former members of the Paradise Lost Army under the condition that they fight for what they believed in, and they keep their actions clean.
He did this largely because he didn't feel it was right to simply abandon the PLA. At some point, he met Kevin Washington. His kind-hearted nature convinced Kevin to join Maverick. In addition, he also offered a full-time employment spot in Maverick to Raiden.