Executive Leadership


Gregg serves as Reasoning Mind’s President and CEO. He started his career as an actuary and then switched careers to pursue his passion for education and became a high school math teacher. In 2000, Gregg started AP Strategies, a nonprofit that served Texas school districts in dramatically increasing student performance in math, science and English. Most recently, Gregg served as President of the National Math and Science Initiative, a national nonprofit serving over 500 school districts. In his spare time, Gregg enjoys running and creating new adventures with his family.

Gregg Fleisher headshot
Photograph of Alex Khachatryan.

ALEXANDER R. KHACHATRYAN Co-Founder and Chief Product Officer

If Reasoning Mind is a team of scholars, Alex is our dean. He co-founded Reasoning Mind with his family in 2000 and continues to lead the charge toward making our mission a reality. After immigrating to the U.S. from the former Soviet Union as a refugee, Alex led Texas A&M’s artificial intelligence lab before going on to run a successful consulting firm with his wife, Julia. He holds a bachelor’s and a master’s degree in mathematics from the Moscow Oil and Gas Institute and a doctorate in physics from Moscow State University. After mathematics, Alex’s favorite creative pastime is dramatic theatre.

JULIA KHACHATRYAN Co-Founder and Senior Vice President

Our organization’s creative maestro, Julia has played a central role in Reasoning Mind’s success from the beginning. Wearing many hats, Julia oversees program usability and quality control, and also leads our art and design functions—filling our programs (and our office) with the creative spirit.  Her team of talented artists, designers, and voice actors ensures our students are captivated by math. Julia has a bachelor’s and a master’s degree in petroleum engineering from the Moscow Oil and Gas Institute, and began her career as a research scientist, authoring numerous technical papers. In her spare time, Julia enjoys gardening, cooking, reading, and teaching her brilliant poodle—Toozik—new tricks.


Photograph of Julia Khachatryan.

DEB MEYER Vice President of School Partnerships

As head of School Partnerships, Deb’s mission is to provide as many students the opportunity to learn and love math using programs from Reasoning Mind. Deb and her team work to ensure every student, teacher, and administrator experiences great success with Reasoning Mind. Prior to joining Reasoning Mind, Deb ran sales and customer success at a math curriculum organization, sold lesson-delivery software and interactive classroom technology at Promethean, served as an assessment coach, and back in the day, taught 7th grade social studies. Deb has her Masters in Assessment and Professional Development from the University of St. Thomas and a bachelor’s degree in Secondary Education. Deb loves watching her daughter play USAV volleyball and is passionate about health and fitness.


RENÉE WHITE Vice President of Development

Reasoning Mind’s fundraising phenom, Renée oversees the donor partnerships that help make our programs possible. Prior to joining the team, she held leadership positions at several education organizations, including Partners in School Innovation, MIND Research Institute, and the “I Have a Dream” Foundation, among others. She holds an M.P.A. from Penn State and a bachelor’s degree in Politics, Values, and Social Change from the University of Washington. In her spare time, Renée enjoys traveling with her family and acting as a Girl Scout Co-Troop Leader for her daughter’s Junior Troop.


Headshot of Reasoning Mind's Vice President of Development, Renee White.
Photograph of Tim Tarrillion.

TIM TARRILLION Chief Financial Officer

Tim is Reasoning Mind’s numbers and operations guru, bringing more than 35 years of management experience and expertise to the team. After a successful career growing various other companies and organizations as their founder, CEO, COO, or other senior management member, Tim decided to apply his skills in an area he’s passionate about: STEM education. When he’s not working, Tim enjoys spending time with his family, improving his golf game, and designing residential homes as an amateur architect. He holds a chemical engineering degree from Rice University and an M.B.A. from Harvard.


JULIA TRABERT Chief of Staff

As Chief of Staff, Julia is charged with furthering Reasoning Mind’s mission and improving overall organizational effectiveness and accountability. She loves being on the Reasoning Mind team as it means to gets work with a group of dedicated, intelligent people to help kids learn and enjoy math. After getting her BBA from the University of Texas at Austin, she worked as an AmeriCorps Fellow, closing the achievement gap for middle school students in Houston ISD. Julia lives in Denver, Colorado where she spends her free time hiking, running, skiing, and camping.

Julia Trabert
Photograph of Andrey Romashov.

ANDREY ROMASHOV Vice President of Curriculum Development

Turning out pedagogically top-notch math programs is no easy task, but Andrey tackles this challenge with gusto. As VP of Curriculum Development, Andrey assembles and oversees a team of mathematicians, master teachers, and pedagogy experts in their collaborative effort to produce the best possible math content for students. With two degrees in applied math and physics, Andrey is passionate both about the subject matter and the necessity of bringing quality instruction to more students. He’s also Reasoning Mind’s reigning table tennis champion.

MONIQUE LORD Vice President of Operations

Monique is Vice President of Operations for Reasoning Mind, where she supports our management team and staff by providing resources, recruiting talent, and managing internal processes and communications. As a former math teacher, Monique believes a quality education is vital for all students, particularly those struggling to break free from the cycle of poverty. Monique has nearly a decade of HR experience, as well SPHR and SHRM-SCP certifications. Her bachelor’s degree is in Family, Youth, and Community Science from the University of Florida, and she’s still partial to the Sunshine State: in fact, her favorite vacation spot is the beach, accompanied by her family and a good book.
Photograph of Monique Lord.
Photograph of Yuri Belikov.

YURI BELIKOV Chief System Architect and Vice President of Software Development

Yuri is Reasoning Mind’s IT-maven, overseeing all aspects of our software development and technology infrastructure. Yuri started as a software engineer in 1996, and has worked as a project manager, software development manager, and software architect. Yuri likes to solve complex math problems and riddles, especially in geometry, and enjoys helping his children learn math. When he’s not working, Yuri spends his time away from the computer reading classic literature, doing handiwork on his family country-house, and playing sports with his three children.

KONSTANTIN GUARIAN Head of Moscow Branch

Konstantin heads Reasoning Mind’s Moscow branch, where much of the organization’s software development is conducted. He handles the office’s business, personnel, and accounting activities. In addition to his management specialties, Konstantin holds a bachelor’s, master’s, and doctorate degree in computer science, and has published nearly 40 professional articles on computer networks, database management systems, and artificial intelligence.  A renaissance man, Konstantin enjoys world travel (Italy is his favorite destination), the theater, and photography.

Photograph of Konstantin Guarian

Senior Management

Photograph of Audrey Pitonak-Goff.

Audrey Pitonak-Goff
Executive Director for West Virginia
Photo of Adam Powell, Reasoning Mind's Executive Director for North Texas.

Adam Powell
Executive Director for North Texas
Photograph of James Talarico.

James Talarico
Executive Director for Central Texas
Photograph of Nathaniel Rounds.

Nathaniel Rounds
Director of Curriculum