Mars Area School Board has appointed Richard Cornell to serve as a substitute principal at Mars Area High School during the maternity leave of principal Lindsay Rosswog.

Cornell, who will serve in the position March 1 to April 29, previously served as a substitute principal at the high school in 2016.

He later retired from Mars Area School District, after serving for 13 years as Mars Area Middle School principal from 2002 to 2015. Prior to joining the district, Cornell was a principal, an assistant principal, seventh- and eighth-grade math and science teacher, and a fourth- and fifth-grade teacher at Washington School District in Washington, Pa., where he began his career in education in 1975.