Imbalance?
A thoughtful CIO...What rubbish. The best person should get the job. What if a woman doesn't apply? Affirmative action discriminates based on "minority" status, meaning race, or being a woman, sometimes sexual orientation. How does that get the best person? How is discrimination right?
If you really want more women in IT, then start in primary and secondary school. Get more girls interested in IT before they get to college so they want to pursue IT in college and as a career.
On the other hand, there is an imbalance in Education. Most teachers are women, especially in primary schools. Should a sensitive principal hire more men?
The bottom line is to hire the best person for the job. I will also add that compounding this is that the recession has been called a mancession, meaning men have been laid off in much larger numbers than women, so there are a lot more men looking for work in general.