I am back (I suspect there may be some message about having to do women's network 2018 planning in your own time here...)
On your website - if you list C-suite/senior management, make sure there's more than one token woman. If you include photos (and that is preferable in my opinion), it makes it very clear very quickly if your board/senior managers are all white men, and as I'm not currently unemployed, but only interested in jobs which would be better than I'm currently in - that sort of thing means I won't even bother applying.
I agree with blind CVs. It's also worth looking at other recruitment tasks. Quite a few tech jobs now often include some sort of project to see how you work, rather than just interview. However, you don't want to look like you're getting people to do all your work for free, and it doesn't always work - you need to be clear about the language and so on too. I read these two articles over the weekend -
www.linkedin.com/pulse/wanted-eliminate-gender-bias-technical-hiring-ended-up-hunter-walk
www.linkedin.com/pulse/part-2-how-lose-female-engineering-candidates-hunter-walk/
Unconscious bias training for anyone involved with interviewing (ideally train everyone, but if you're starting out, you need to focus on certain groups.)
Definitely encouraging and facilitating part time working, opportunities to work from home, flexible hours (IME, out of hours working is required for quite a bit of tech work - code releases and maintenance, so there has to be some flexibility.)
What about returnships? Encourage women to come back by offering training and support.
Support men in taking work breaks for parenting and be the stay at home parent.
Pipeline - "if you can see it you can be it" and all that. I am in a particularly male-dominated area of tech, and I can't see it at the moment. Most of the senior technical women I see in the company are American. There's just one other woman in my entire reporting line of 9 to the very top. As a woman, in a tech department, who's not in the USA, I can't see it. And yet some bloody useless men get promoted. This is one of the reasons attrition rates for women in their 30s and 40s is so dire. I'm clinging on, but oh, god, it's tiring at times.
Mentoring, women's network, all that sort of thing - honestly, it really does help to spend time with other women in the workplace from time to time. Think about sponsoring women in tech events - helps get your name known, too. Being the only woman can be very wearing at times. I am more likely to take a bit more notice of employers who advertise on Mumsnet or other places like We Are the City, which are women-focussed. It shows they're at least thinking about how to attract more women. And as you'll have to be publishing your gender pay gap stats if you haven't already, then make sure they're showing the right picture, too.
Physical workspace - are there signs on the datacentres and other technical areas saying "beware men working behind doors"? Get any of that stuff changed to "beware workers behind doors" or similar. It might be minor, but all these little minor things that don't include you do add up, and oddly, it's just as much a hazard if I've got floor tiles lifted as if my male colleagues do. Also, emails starting, "Dear gents" and similar - just don't. Nothing wrong with "dear all," and no chance of excluding anyone that way.
Clear performance criteria. We have lists of technical capabilities, and at certain levels, you're expected to be able to display expert status in 3 capabilities, and competent in another 5 and so on. There's also a list of leadership capabilities. You need to be clear that reaching a particular level doesn't automatically result in promotion, as that is also dependent on budgets, vacancies and so on, but I do think it can help women (who may be judged more harshly than male colleagues for the same competencies and behaviours) to be able to see their abilities in an objective way. This also comes back to women only applying when they can meet 80% of a job's criteria, and men when they only meet 20% (or whatever the stats currently are.)
Have an introduction programme to explain the company structure and what different areas do. (That's not just about women in tech, that's every bloody company should do that - some places, it can be very difficult to see how the different areas hang together.)
It might be better to have a graduate conversion for women who realise they have a useless non vocational degree when they've grown up.
Yes, actually - a lot of women in tech have come in from indirect routes, far more than men. I think they make better employees, with broader experience. Coming from a critical thinking type of degree (history, literature) or linguistics or something, add some tech training to that, and you've got someone who is likely to be much better than someone who did computer science from GCSE through A-levels and university and then straight into a grad tech role. You need diversity of thought, and non-standard routes in is one way to get that. Do you offer apprenticeships?
I was recently at a women in tech event, and they had a student teaching, who said she had never really had any careers discussions. We also recently had some people giving mock interviews at one of the local schools, and often the teenagers have no idea of the range of roles available, not just in tech, but in many areas. That alone is limiting them. So offering mentoring to schools, work experience and so on is going to be important for long-term encouragement. Apparently primary schools get quite a lot of STEM involvement from industry ("eight is too late" and so on,) but then it drops right off at secondary, but that's when they're choosing exam subjects and so on, and there's little point about getting them all fired up at primary if that's the last they ever hear about it. Speaking to parents is also important - ask someone what a chef or a nurse or a farmer does, and they've got a fair idea (however inaccurate it may actually be,) but ask them what a systems administrator or a business analyst does, and they'll have no idea, unless they're already involved, and parents often have a big influence on children's careers choices, even if it's only letting them know that certain careers exist, because they sometimes talk about them. Awareness needs to start somewhere.
And stop promoting mediocre men when there are talented women about... Actually, management in tech is a bit of an issue (not just tech) - you can get so far up the ladder on your technical abilities, and then the next step is management, regardless of whether you've ever shown any people skills at all. More competent management would solve quite a lot of issues in tech, and other areas, regardless of issues around how many women there are or not.
And now I really should go to bed.