Okasha is President of the Egyptian Psychiatric Association, Honorary President of the Arab Federation of Psychiatrists, was President of the World Psychiatric Association (2002 – 2005), President of the Egyptian Society of Biological Psychiatry, President of the WFSBP, Chairman of WPA Review Committee (2008 – 2011), Chairman of WPA Ethics' Committee (1993 – 2002).
He has been on the editorial advisory board of twenty international scientific journals. He was awarded the golden Medal of ICAPAP ( 2004), Honorary Fellowship of The American College of Psychiatrists (2002), Fellow of Royal College of Physicians (Edinburgh, 1973), Fellow of Royal College of Psychiatrists (London, 1973), Honorary Fellow of WPA( 2005), and Presidential Commendation of APA (2006).
He has published more than 260 original articles in national and international journals, was an editor and contributor of 47 books. Okasha received the State Merit Prize in Creativity in Medicine (2000), State Merit Award in Medical Sciences (2007), and El Nil Merit Award in Medical Sciences (2010).