I'm also a woman in engineering and I've encountered sexism a lot more than once. However, the majority of it was not more than a temporary and not major obstacle in my career path. (Some of it has even made for great party stories, like the time the sales rep for a manufacturing company I was visiting told me not to "be nervous once we got out onto the shop floor," and I asked why, and he was like, "the guys just aren't used to seeing anyone that looks like you out there, so just don't look at any of them or listen to anything they say." OMG! ...AND I would like to say here that every single shop floor guy was a perfect gentleman for my entire time there, so not only was that dude completely sexist, he was a total twit.)