Complex sentence: He has more than 35 years of teaching experience at Under Graduate and Post Graduate levels and he was Head of the Department of Computer Science and Engineering, NIT Calicut during the years 2000 to 2005.
Split into simpler sentences: He has more than 35 years of teaching experience at under graduate and post graduate levels. He served as Head of the Department of Computer Science and Engineering, NIT Calicut during the years 2000 to 2005.