My situation at work is that myself and another colleague who has newly graduated work together. I'm senior to her with a management role.
The trouble I'm having is that she doesn't treat me as senior to her. In fact quite the opposite. She steamrolls over everything I do and is massively competitive. She seems to take over everything and even things I've implemented she will take over and claim it as her own. This has resulted in it looking to our boss as if she does everything which is totally untrue. I work very hard at work and I do a lot of work behind the scenes to do the best I can. She has a much bigger focus on doing things that are on show to others.
I'm wondering if I'm the problem and need to be more assertive with her. On a personal level she's lovely but work wise she seems to be trying to belittle me and take over.
What tips can you give for dealing with this kind of colleague?