Sample size of one, I worked in the past for a company whose entire staff was white men, 100%. Except for a single role: the receptionist at the front desk. There is no reasonable biological explanation for this extreme distribution.

As a side note, it's quite ironic that engineers often tend to complain about performance metrics and that they are being gamed, not really a good measure of merit..., but the same people turn around and argue that the everything should be a meriocracy.