Chief (joinchief.com), a private network of exceptional women, today announces the close of a $3 million seed round. Led by Primary Venture Capital and Flybridge Capital Partners, investors also include Accel, Box Group, Able Partners, XFactor Ventures, Silas Capital, BBG Ventures, and LearnVest Founder and CEO Alexa Von Tobel. Chief’s mission is to promote and accelerate female leadership, starting at…