I have a sister in tech! She studied New Media in university and went into school liking photography and 3D, and left school with additional appreciation for web design, interactive installations (cameras + sensors + screens), and a passion for editing videos.
When she graduated she was looking for video editing jobs but found work in web and has been happily doing that ever since.
Over the course of almost a decade and a half in the workforce, having worked at a variety of web companies in the town she lives in, I have finally had the chance to collaborate with her and her company by being an 'overflow contractor' at her workplace a few times.
There are very few things that make a little brother more proud than seeing his big sister being loved, respected, and appreciated by her co-workers and boss. Right now she's doing a lot of project management work, but also handles support, troubleshooting, and quite a few other things every day as well (when needed). They respect her and invest in her by giving her the training and tools she needs to extend her skills.
I have heard stories about women being mistreated in tech (and it breaks my heart when it happens), but I just wanted to share a positive story. A woman in tech (my sister) inspired me to get into tech!
I'm not sure if 'tech' has a problem with sexism though… I do believe you can have bad people in any field, any industry, any company, or even any team. If you want to get rid of sexism where it appears, I think bringing offending employees into discipline and even firing them for unacceptable behaviour is the right way to provide that healthy environment for all your staff. It's unfortunate that tech isn't immune from the same problems every other industry has, but I think the solution for tech is to deal with these problems the way it's dealt with in other industries!
For me as a self-employed contractor/freelancer, doing my part means treating all clients and colleagues with dignity and respect, and looking at what people do more than what people are.