Great idea - well done.
I think topics could be:
- job focused, so how to make an impact, take credit when due and learn from mistakes.
- profile raising - so internally the nuances of what meetings/people/project matter, which a junior might not yet understand.
How to foster relationships.
Externally how and where to network. The value of developing an external profile and as young women they might have a 'token' factor which could help them get onto speaking platforms - use that.
- conduct. This is linked to the barrier point. I was recently privy to some internal notes at a 'old boys network' type of club. They were discussing some applicants for a commitee. It was notable that the things that the women (as 2 out of 6 were) were marked negatively could be viewed as typically female eg talking too much, not talking with enough conviction.
Whilst in an ideal world we would all be ourselves, I do think if the room is full of men it could be helpful to 'self edit' in order to get them onside. Once onside you can then try to change the system IYSWIM.
That could be conduct in meetings (I have been guilty of opening my note pad before the meeting starts and twice mistaken for the junior minute taker because of this. I noted that all the men kept their books shut until they needed to write a note). But also general behaviour in certains situations.
I also wonder if the mentors could faciliate the mentees shadowing them/attending senior meetings to help them understand what they are reaching for.
As mentioned though a key to the success of the project will be understanding
why there aren't more women at the top and what can be changed in order for this to happen? I would ask the senior amd junior staff why they think it is....
Finally, take notes of the process. If this is a success this will make a great case study for speaker platforms for you (assuming the co is up for sharing).
Good luck.