Chimera is an Allegiance sub-faction featured in Call of Duty: Modern Warfare (2019). Chimera is a Private Military Company under the leadership of "Nikolai". It seems to hire former military operators from multiple countries as well as "dirty" soldiers, having problem with law and former gangsters.
In the campaign, despite not appearing officialy under the Chimera name, Yegor is a supporting character in Old Comrades level.
In the multiplayer Chimera seems to be paid by Allegiance.