Complex sentence: He received his master degree from the Charles University in Prague, and his Doctor of Philosophy degree from Rutgers University and has been a Harvard Junior Fellow (2001-2004) and assistant professor (2004-2007) at Harvard University.
Split into simpler sentences: He received his master degree from the Charles University in Prague, and his Doctor of Philosophy degree from Rutgers University. He has been a Harvard Junior Fellow (2001-2004) and assistant professor (2004-2007) at Harvard University.