The Center for Women in Mathematics currently has two directors (Ruth Haas and Jim Henle). Email queries sent to mathchair will reach at least one of us.
If you'd prefer to use the telephone, call the department secretary, Heather McQueen at (413) 585-3803, and she will route your call appropriately.
To contact some current post-bacs, feel free to email Agnieszka Rec or Sasha Berkoff.