So if your wife reads this thread your in the clear now eh?
I work with technical people (real technical people) mainly engineers and scientists.
Our two current projects are the largest in the world at present - a huge amount of offshore and onshore work, with fabrication in 12 countries.
We have a lot of female science people in enviro / H&S and a few in engineering (mechanical and process) but most of the other engineers are men.
Most of the construction engineers (civil etc) are men.
I'd say about 65 / 35 in the technical area ... a very rough guess.
The best risk engineer we have is a Chinese / Australian woman ... one of our best interface engineers is a Russian woman. I work with a Kazak engineer as well and his wife makes the meanest cookies.
Frankly if you can do the job I'll work with you ... if you can't then move on.
We do have about 50/50 in IM&T (IT) but I only know our info risk guy well and the helpdesk guys because I have moved pod a couple of times.
I leave them chocolate ... they keep my workstation humming.