Our National Staff consists of the Founders and Alumni of Sigma Alpha Sigma. If you have any questions or comments, we'd love to hear from you!


Amanda McCallister | Founder, National Advisor

Stetson University


Amanda McCallister is a Nationally Board Certified teacher with a Master’s Degree in Educational Leadership.  She is a graduate of Winter Haven High School, Stetson University, and the American College of Education.  In her time as a teacher, Amanda is most proud of the work she has done with her students to create Sigma Alpha Sigma.  She is excited to go to work each day in a classroom she shares with her husband at Ridge Community High School, being able to teach alongside her husband inspires her to be the best teacher she knows how to be.  She believes strongly that parents send the best student they could raise to school and that students arrive at school each day wanting to be successful—teachers must step in to do the rest.  She believes all people are capable of learning and want an education.  Her background as a teacher and belief in education drives her work as National Advisor through which she hopes to motivate students in high schools across Florida to support each other, improve their schools, and set high academic goals for themselves.

Contact Amanda:  Amanda.McCallister@SigmaAlphaSigma.org


Thomas Lentz | Founder, Chief Financial Officer

Stetson University


Thomas Lentz is a Nationally Board Certified teacher with a Master’s Degree in Educational Leadership. He is a graduate of Belleview High School, Stetson University, and the American College of Education. He is an active member of his local, state, and national teachers’ union which gives him the opportunity to bargain teacher contracts, contribute to policy decisions, organize his colleagues, and teach young professionals. Whenever asked why he teaches, Thomas smiles and says he always wanted to grow up to be a teacher because teachers were the most respected people he knew as a child. He enthusiastically states he gets to live his American dream every day. He believes that students are capable of learning and it is the calling of educators to inspire them to achieve to their potential. As Chief Financial Officer and a National Trainer for Sigma he can help students and educators realize that they can create a future where they can be the transformative leaders they were born to be.

Contact Thomas: Thomas.Lentz@SigmaAlphaSigma.org


Cristina Vega | Founder

University of vermont

Cristina Vega is a second year graduate student at the University of Vermont getting her Master's degree in Higher Education and Student Affairs Administration. She is currently an Assistant Residence Director at UVM and volunteers her time with Fraternity and Sorority Life. She serves as the Membership and Alumni Relations Director for The Vermont Connection journal. Cristina did her undergraduate work at Florida Gulf Coast University where she majored in Communication and minored in Business Management. While at FGCU, Cristina was involved in residential life, orientation, and fraternity and sorority life (she is a proud sister of Chi Omega Fraternity) and has continued this work at UVM. Cristina is passionate about alternative pedagogy and believes in empowering students to take a lead in their own educational success. In the future, Cristina hopes to combine her passion for working on a college campus with Sigma’s efforts to promote academic success.

Contact Cristina: CMVega@uvm.edu

Codi Mulberry | VP of Curriculum

Stetson University


Codi Mulberry is a 2014 graduate of Ridge Community High School and a member of the 2010 Founding Class of Sigma Alpha Sigma. During his time in Sigma, he served as a family head (Fennec Foxes), as a Director of Fuse (a freshmen tutoring program), as the Instructional Services Trustee (managing four different tutoring programs), and on the National Board of Directors. Codi is now a student at Stetson University majoring in Finance and minoring in Statistics. He is a Bonner Scholar and a brother of Delta Sigma Phi. He is excited to be mentoring first year Hatters at Stetson through their FOCUS program. He is also on Stetson’s LEAD team, a group of student leaders who work to develop, design, and facilitate programs to further student leadership development at the university. In his work as VP of Instructional Design, he hopes to create dynamic leadership training to develop the student leaders of Sigma Alpha Sigma.

Contact Codi: CMulberr@stetson.edu


Dereck Williams | VP of Expansion

Stetson University


Dereck Williams joined the Sigma Alpha Sigma family with the Founding Class of 2010. During his membership, he mentored fellow Sigmas as a family head (Ruppell’s Foxes), worked as a Footprint Choreographer, and later became the Footprint Director. He is currently attending Stetson University as an education major. He is the cheerleading captain at the university and gives tours to prospective students as a Student Ambassador. He also ensures the first year students are happy with their brand new home by mentoring them as a freshman orientation leader (FOCUS). Dereck plays an active role in his fraternity, Delta Sigma Phi, as VP of Recruitment. He also holds a part-time job working in admissions for the university. As the VP of Expansion, his job is to direct the expansion of the organization to serve the students of high needs high schools. He builds relationships with students, teachers, and administrators of chartering schools to ensure that the schools’ needs are met by Sigma Alpha Sigma.

Contact Dereck: DWillia2@stetson.edu


Jackielyn Wool | VP of Marketing & Design

University of Central Florida


Jackie Wool graduated from Ridge Community High School in 2012 and began her journey with the 2010 Founding Class of Sigma Alpha Sigma.  She has served as the Alpha Chapter’s Member at Large, the Founding Family Head of the Blanford’s Fox family, and Director of Brainstorm (Sigma’s AP tutoring program). It was in these early roles that she found her passion for management and teaching. She is currently finishing her last year at the University of Central Florida and is majoring in Human Resource Management, with a minor in Music. Jackie is also a Brother of Kappa Kappa Psi, a band service and leadership fraternity which aims to serve its college and university bands, their music departments, and their appropriate institutions, and will be serving as her Chapter’s President for the 2015-2016 school year. As VP of Marketing and Design, her main duties include the upkeep of Sigma’s websites, planning marketing initiatives in order to better showcase Sigma’s purposes and vision to school’s in need, and working with Chapters to help strengthen students’ understanding of how their actions truly impact the face of the organization.

Contact Jackie: Jackielyn.Wool@knights.ucf.edu