When Letizia Jaccheri became department head, she realized that she was the only female in both the leader group of her Science, technology, engineering, and mathematics (STEM) faculty and in the leader group of her department of computer science. While the percentage of female students in STEM at the university had reached almost 30% thanks to actions to which she had contributed for almost 20 years, the number of female professors in STEM was only 13%. It was then that the idea of the IDUN project was born. The central measure in the project was the employment of nine female adjunct professors, at least one at each of the seven institutes of the faculty. IDUN provided training for these professors to become role models and mentors for 3-5 mentees each. The present paper aims to give a summary of the project, as well as looking at the consequences and future implications.