Closest thing I can find that seems relevant in there:

"Compared to overall private industry, the high tech sector employed a larger share of whites (63.5 percent to 68.5 percent), Asian Americans (5.8 percent to 14 percent) and men (52 percent to 64 percent"

First point would be that doesn't really support your contention that 90% of tech employees are white men.

That said, they can't be measuring what we think of as tech; it's certainly more than the claimed 64% male. I'm pretty sure that restricted to actual tech, it would be both more male and less white.