The Connect STEM Mentoring Program aims to provide professional and career connections to women in STEM. As a product of an ADVANCE grant funded by the National Science Foundation, this program strives to promote advancement for women in STEM. As a male-dominated field, women in STEM commonly face barriers to advancement opportunities which can negatively impact a woman's career self-efficacy. This single-embedded case study seeks to understand how and why, if at all, the Connect STEM Mentoring Program develops career self-efficacy in career advancement for mid-level and senior-level female faculty members. The study investigates faculty members' participation in a three-component mentoring program including online mentoring training, mentoring relationships between mentees and mentors, and networking luncheons. The findings of the study provided an extension of the literature and discovered the Connect STEM Mentoring Program provides a personal and professional experience that continued to develop participants' self-efficacy for career advancement even after the program concluded. The study is grounded in Social Cognitive Career Theory, an extension of Self-efficacy Theory, as the foundation for inquiry and analysis. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]