One of the founders of Umbrella Pharmaceuticals, Lord Spencer was the CEO and President for its entire existence.
Spencer had a vision to remake the world and lead it into a new era, seeing the world's current state as self-destructive.
This Oswell Spencer is a clone created by the original in case the latter is killed. He managed to recover DNA from Alex Wesker as well as that of Albert Wesker in an attempt to recreate a new generation of individuals similar to them.