Dave of Canada wrote...
Cerberus, as told by EDI, is composed of around 150 people spread out into three different cells. One of these cells is the Lazarus cell, which was mostly destroyed after Wilson's betrayal and the rest joined the Cerberus project to assist Shepard in stopping the Collectors.
Assuming twenty to thirty individuals died during the revival, this would leave around 120-130 individuals in Cerberus. Though it's entirely possible EDI was listing the live operatives at the time, which could possibly keep the number still at 150 individuals.
Though Miranda alluded that the entire crew of the Normandy SR-2 was considered part of the Lazarus Project cell, so it is safe to assume that everyone involved in Sheppard's mission is also part of the cell. Also, as told by EDI, the different cells don't know how many cells there are, what they are working on, or who is part of another cell, and given her restricted access to Cerberus files, I doubt that even EDI knows how many cells there are in operation. With a group like Cerberus, I doubt that they don't have sleeper cells waiting to be activated when they are needed for their given task. Also, there is a video in the Shadow Broker's base of Captain Anderson speaking with a Cerberus agent. Given Anderson's belief in Sheppard's findings, it is possible that he is more open minded toward "taking all the help he can get" even if it does come from Cerberus.