Datuk Khairuddin obtained his Master of Arts (MA) in International Relations and Strategic Studies, Lancaster (1988) and Diploma in International Relations, Lancaster (1987).

Datuk Khairuddin began his military career in 1967. He had acquired extensive experience during his years of service in the military, rising from the rank of Second Lieutenant to the rank of Lieutenant General.

In addition, he was also selected as the first Malaysian military officer to serve at the United Nations Headquarters, New York from October 1991 to October 1993. From August 2003 to May 2005, Datuk Khairuddin was appointed as Force Commander Peacekeeping Force, United Nations Mission of Support in East Timor before retiring from the military service in August 2005.

After his retirement, he actively involved himself in the corporate and business sector. Currently, he is holding the chairmanship and directorship in MXB International Holdings Sdn Bhd (a multi-level marketing company) and OLINUS Security Services Sdn Bhd (a security company).

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