Meet Our Management Team

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Tom Cummins

Hello, I’m Tom! Our efforts to inspire “kids of all ages” in the sciences creates the unique opportunity to make a long-term, positive impact on others. Just a chance of making a positive difference in a single person's life makes all of our hard work and efforts worthwhile, and I'm happy to report we have achieved far more than that; it's something my staff and I are very proud of.

Founder & President

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Julia Lizik

Hi, I’m Julia! I have a bachelor’s degree in psychology from UMBC and I plan on pursuing higher education in the field of child development/education. I have always loved the sciences and I believe that engaging, hands-on education is the best way to spread knowledge! GTC’s mission statement stands very close to my heart, and I am honored to be part of the GTC family.

Store Manager, Event Coordinator & Educational Program Presenter

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Dr. Jessica Lawrence Wujek

Educational Programs Manager & Educational Program Presenter

My name is Dr. Jessica Lawrence Wujek and I am a geologist and paleontologist. I love to study marine reptiles, specifically ichthyosaurs. I received my bachelor's in geology at Ohio Wesleyan University in 2006, my master’s in geology/paleontology from Bowling Green State University in 2008 and my PhD in geology/paleontology from University of Southampton in 2018. I joined this company because I wholeheartedly believe in its mission. Spreading knowledge of science is incredibly important!

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Iszi Mangana

Vice President, Operations Manager, & Educational Program Presenter

Howdy, I'm Iszi! I have a bachelor’s degree in biology and gender studies from Randolph-Macon College and a passion for sharing the love of the planet we live on. I believe that one of the best ways to encourage people to engage with the sciences is to make it entertaining and fun, as well as relevant to our daily lives, and that’s what I love about GTC and our mission!

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Stephanie Pelletier

Graphic Arts & Social Media Director, Assistant Store Manager, & Educational Program Assistant

Hey, I’m Stephanie! I have a bachelor’s degree in children's book illustration from Rocky Mountain College of Art & Design. I have always had a passion for art & science and this job is a perfect blend of both for me. I am excited about all that this company has in store for the future and can't wait to help bring the mission of inspiring others to learn more about the wonders of this incredible planet to life!

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Hazel Campos-Braus

Educational Program Assistant Manager & Educational Program Presenter

Hi, I’m Hazel! I am a STEM/STEAM/Science educator and I have a bachelor’s of science in classroom education. I’ve loved the sciences all of my life, but really started focusing my interests back in the Science and Technology program in my high school. I’ve served as a Team Manager for Destination Imagination, a leader for Boy Scouts and I am still currently a leader for Girl Scouts. I’ve worked as a Mad Scientist, a science teacher, and as the STEM educator with iFLY Indoor Skydiving - but my interests have brought me here to the GTC Rock Shop. I believe in their mission to bring the sciences to “kids of all ages” and I look forward to sharing my love of science with you all! SCIENCE ROCKS!!!