Complex sentence: Dr.Jan obtained his PhD from University College Cork, followed by three years Post-Doctoral work in the University College Dublin, in the Republic of Ireland, returning to Pakistan in 1985, he joined the Department of Chemistry at the University of Peshawar as Assistant Professor.
Split into simpler sentences: Dr.Jan obtained his PhD from University College Cork, followed by three years Post-Doctoral work in the University College Dublin, in the Republic of Ireland. Returning to Pakistan in 1985, he joined the Department of Chemistry at the University of Peshawar as Assistant Professor.