Celebrating International Day of Women and Girls in Science 2025

Science has long been a field where women have had to push against barriers to claim their space. At Public Health U (PHU), we celebrate International Day of Women and Girls in Science 2025 by highlighting the voices of three remarkable women. We spoke with Dr. Valeria Reynolds, our newly appointed PHU Academic Director; Dr. Magali Collonnaz, our Public Health Subject Matter Expert; and Alixandria Ali, our Lead Instructional Designer. Valeria and Magali are epidemiologists with their MPH’s and doctorate degrees, while Alixandria is about to graduate with her MPH degree and plans to pursue another masters degree in education.They work closely together to develop courses, design curricula, and make our programs accessible to learners worldwide. Through an interview-style discussion, they share their challenges, insights, and aspirations for the future of women in science, offering inspiration and guidance for the next generation of leaders.

Overcoming Challenges as a Woman in Science

Despite their impressive qualifications and contributions, all three women have faced obstacles on their professional journeys. They shared their experiences and insights on navigating these challenges and breaking barriers in the field.

Question: What challenges have you faced as a woman in science, and how have you overcome them on your journey?

"Even as a highly qualified professional with international experience, I’ve occasionally encountered biases and assumptions that underestimated the value of my background. These challenges were particularly evident when transitioning to work in a new country, where being a foreigner was sometimes seen as a disadvantage. I overcame these barriers through persistence, adaptability, and showcasing the impact of my work. By leading complex projects and leveraging my diverse expertise, I demonstrated the tangible value I bring."

Dr. Magali Collonnaz

Public Health Subject Matter Expert

"Initially, there were some challenges. I had the impression that if there was someone else who could claim the positive outcomes of my work, they would. However, I was able to overcome this obstacle by consistently advocating for myself and having a very strong support system in place, which enabled me to continue making my best efforts."

Dr. Valeria Reynolds

PHU Academic Director

“After earning my undergraduate degree, I worked in an academic chemistry lab where I often felt unheard compared to my male counterparts. Then, during a job interview at a pharmaceutical distribution company, I faced blatant gender bias. Instead of being asked about my skills and qualifications, I was questioned about my personal life—whether I planned to marry, have children, or if I was allowed to drive alone. Experiences like these were disheartening and, frankly, infuriating. But rather than letting them deter me, I chose to channel my frustration into empowerment. I reminded myself that if I had encountered these barriers, countless other women in science had likely faced similar challenges. That realization helped me feel less alone and motivated me to push forward—not to prove my worth, because I know I don’t have to—but to show that women belong in STEM. More importantly, I feel a responsibility to uplift and support other women in science, ensuring that future generations face fewer obstacles than I did.”

Alixandria Ali

Lead Instructional Designer

Advice for Aspiring Women in Science

For young women looking to pursue careers in science, particularly in global health and public health, our interviewees highlight three key areas: technical expertise, leadership, and perseverance.

Question: What advice would you give to young girls and women aspiring to pursue a career in science, particularly in fields like global health and public health?

"Pursue your passion with curiosity and determination, focusing on building strong technical and analytical skills, as well as leadership and communication. Take advantage of international training opportunities and leadership roles (even if they are voluntary), especially early in your career. These experiences provide invaluable insights and transferable skills that will set you apart in competitive senior roles."

Dr. Magali Collonnaz

Public Health Subject Matter Expert

"A career in science is one of the most rewarding experiences, and it requires a significant amount of effort. The foundation of these paths is critical thinking and knowledge of the scientific method, its benefits, and its limitations. Success in this field is contingent upon an understanding of these concepts."

Dr. Valeria Reynolds

PHU Academic Director

“You can do it. Believe in yourself, and don’t wait for external validation to confirm your capabilities. Fields like science, global health, and public health can be demanding, and at times, you may encounter people who suggest that you can’t balance your career with what society expects from women. Ignore those voices. Stay focused on what you want to achieve.”

Alixandria Ali

Lead Instructional Designer

The Power of Mentorship and Networks

Strong mentorship and support networks play a vital role in the success of women in science. Guidance from experienced professionals and connections within the field can open doors, provide encouragement, and help navigate challenges along the way.

Question: What role do mentorship and support networks play in your journey as a woman in science, and how can we strengthen them for the next generation?

"Mentorship and strong networks have been essential to my growth as a scientist and leader. Mentors not only guide but also inspire, opening doors to opportunities that I might not have found alone, especially early in my career. Building strong professional networks and confidently advocating for my skills were instrumental in overcoming hurdles and advancing my career.”

Dr. Magali Collonnaz

Public Health Subject Matter Expert

"In the field of science, the presence of a talented mentor can be a determining factor in an individual's professional development, irrespective of gender. However, having a female mentor has been a profound source of inspiration for me, demonstrating the potential for achieving anything one sets one's mind to. At PHU, we are proud of the growth in our network of volunteers, who are experts in their respective fields with impressive achievements of their own. These individuals generously impart their expertise and skills to our students, contributing to the development of the professionals of tomorrow."

Dr. Valeria Reynolds

PHU Academic Director

“There is a unique mental toll that comes with being a woman in STEM. The pressures, biases, and expectations can be overwhelming, but mentorship and support networks help ease that burden. They remind us that we’re not alone, provide guidance from those who have walked similar paths, and offer a sense of fulfillment. At PHU, I see so many strong women—among both our staff and student cohorts—who inspire me. PHU is already part of this movement for change by offering flexible programs that accommodate the realities of women balancing multiple responsibilities. The organization actively promotes gender equity, ensuring that every voice is heard and valued.”

Alixandria Ali

Lead Instructional Designer

Looking Ahead: A Future of Inclusion and Innovation

This International Day of Women and Girls in Science, PHU proudly honors the achievements and contributions of women in science. We deeply value the experiences shared by our team and reaffirm our commitment to advancing public health, fostering inclusivity, and empowering women at every stage of their careers. To young women aspiring to enter the field—your voice matters, your ideas are valuable, and your contributions will shape the future.