Complex sentence: He also is currently serving as the Associate Editor for the Clinical Child Psychology and Psychiatry, since 2008 to the present and was the Associate Editor for the Journal of Family Therapy from 1997 to 2003.
Split into simpler sentences: He also is currently serving as the Associate Editor for the Clinical Child Psychology and Psychiatry since 2008. Previously, he was the Associate Editor for the Journal of Family Therapy from 1997 to 2003.