The Ligue 2 side confirmed the appointment of Costa on Wednesday morning, with the 36-year-old Portuguese leaving her role with the Iran women's side.
A well-respected tactician and sports science expert, Costa has largely managed in the women's game but has history in the men's, too, having coached at age-group level for Benfica, managed a lower-league side to a regional title, and scouted for Scottish giants Celtic.
Her appointment is a first for women in France and Dugimont, pictured above, told L'Equipe he is looking forward to the new era:
"We learned together this morning. We were told the new coach was this lady. It is a surprise, a big surprise, because a lot of names were circulated; all coaches who were more or less unemployed. It came out of nowhere and now we have to get to know. It is good, it will create a buzz and will be a unique experience."
Dugimont does not believe Costa's relative lack of experience in the men's game will be a problem, nor does he see issues arising with respect.
"I'm not macho. She has worked in the profession and all the boys know how it works. At first it will be a little weird but it will only last a few days. We don't not know how it will happen but if the president has chosen to bring her, we hope it will be okay and I think there are no problems."
"I spoke with the physio and we spoke about the first time a woman entered the army, a very macho environment. Now there are many women in the army and it may be the same in football. I cannot wait for next season to discover. I'm really curious."
Costa, who has also coached the Qatar women's side, will join Clermont officially at the end of the season which has two games to run, replacing Regis Brouard.
Prior to Costa, Carolina Morace coached Italian Serie C1 side Viterbese for two games 15 years ago.
A Celtic spokesperson told the BBC: "She did an excellent job for us and we know she will give her new position the same high level of commitment and dedication which she gave to Celtic."
The news was also welcomed by Najat Belkacem, France's Women's Minister, who said on Twitter: "Bravo Clermont Foot for understanding that giving a place to women is the future of professional football."
Costa also has a good track record in the women's game, having won two Portuguese titles with Sociedade Uniao 1 Dezembro and winning promotion with Odivelas.
She holds a Masters degree in sports science, a UEFA A badge and is a regular speaker at football seminars and coaching workshops.
Clermont plan to announce more details of Costa's deal when she is presented at the end of the season.
- Sports & Recreation
- Helena Costa