Mark entered the education reform work early, teaching five years at the International School of the Americas, one of the first schools of choice in San Antonio.  With an opportunity for change, he then launched and served as principal of the first KIPP school in San Antonio, KIPP Aspire Academy. Following a successful tenure, Mark was appointed CEO of the newly formed KIPP San Antonio Public Schools and oversaw the expansion to seven schools and over 3,500 students. 

After a total of nineteen years with KIPP in San Antonio and Texas, he spent a year leading City Education Partners, working to bring about a cohesive strategy to improve public education in the educationally underserved areas of San Antonio.

Then moving upstream in the educational journey, Mark took on leadership of Early Matters San Antonio, a backbone organization committed to improving the early learning and development ecosystem in San Antonio through a partnership between the Institute for School and Community Partnership, United Way, Workforce Solutions Alamo, and PreK4SA.

A vocal spokesperson for educational reform across the city and state, he has helped broaden the base of community supporters who want to change the landscape of education.

Mark is thrilled to be married to Stacy Pozza Larson and to be on the adventure of raising their kids, Haley (26), Elijah (23), Samuel (21), and Ashlan (8).