oSTEM Executive Committee

Lilian Martinez

Executive Director & CEO

Lilian M. Martinez currently serves as the C.E.O. and Executive Director of Out in Science, Technology, Engineering and Mathematics (oSTEM), Inc. Lilian has a background in Chemical Engineering that took a sharp turn into non-profits. Lilian's expertise is in Event planning, Logistics and Fundraising for 501(c)(3) entities.

Beau Williams


Beau Williams (He/Him/His) was born in Baltimore, Maryland, grew up in rural West Virginia and completed a 4 year tour of duty with the US Army in 1990. He has completed a Bachelor of Arts degree in Cultural Anthropology and Leadership. A Masters degree in Whole Systems Design with a minor in Management at Antioch University, Seattle. Beau advocates for inclusion of marginalized populations, professionally and personally. He seeks out diverse cultures and ways of thinking, no matter how uncomfortable the situation, to continue learning and growing. Beau’s personal vision statement sums up his humble, servant leader style: “Be ashamed to die until you have had a positive impact on humanity and the earth. This guides everything I do.”

William Agnew

Vice President of External STEM Partnerships

Bio coming soon!

Billie Harrer

(Interim) Vice President of Membership

Billie Harrer works as an electrical engineer in the aerospace industry. They are working on a second BS in computer science through Oregon State University. Their involvement with oSTEM began in 2015 with the Georgia Tech chapter, and with the global organization in 2018 via the student membership team. Billie also volunteers with Out for Undergrad on the Travel and Logistics team. In their free time, Billie likes to hike, care for their orchids, and explore Baltimore and DC.

AJ Bryant

Vice President of Inclusion, Diversity, Equity, and Accessibility

Bio coming soon!

Abby Ray

Vice President of Marketing and Communications

Abby (she/they) is currently pursuing a PhD at the University of California Davis where their work focuses on understanding the innate immune response to Mycobacterium tuberculosis.She started volunteering with oSTEM in 2020 as a graphic designer and currently serves as the Vice President of the Marketing & Communications team.In their spare time, they enjoy exploring the coasts of California, making art, reading, telling dad jokes, and spending time with their chosen family.

Janine van Niekerk

(Interim) Vice President of Innovation & Technology

Janine van Niekerk (she/her) is an Engineer in the metro Washington D.C. area. She's been involved with oSTEM in one way or another since her freshman year of college at New York University in 2013. She's held several positions throughout oSTEM including: Conference Logistics Chair and Vice President of Marketing & Communications. She loves video games, hiking, baking, and emo/grunge music.

Matthew Welmers

Conference Chair

Matthew Welmers (he/they) is an analytical chemist for INX International Ink Co as well as the Annual Conference Chair. As an analytical chemist they are responsible for solving customer issues, providing quality control and assurance support for production and developing methods to support Research and Development. While not at work Matthew enjoys volunteering and being active in professional organizations like Alpha Chi Sigma, a chemistry professional fraternity. His involvement with oSTEM began in 2015 when he was selected to be the Conference Programming Committee Chair. Matthew has served as Programming Committee Chair since 2015, stepping up to take over as the Annual Conference Chair for oSTEM 2019. For fun, Matthew enjoys exploring various restaurants, parks and bookstores in the greater Chicagoland area.