Alex Widi Kristiono (Alex) was born in Jakarta, 3 May, 1970, and was appointed as Director of Operations at PT Mandiri Sekuritas (Mandiri Sekuritas) on 6 September, 2022. Alex holds a Bachelor's degree in International Relations from Parahyangan University, Bandung, 1994 and a Masters’ degree in International Business and Management from University of Westminster, UK, 1995.

Prior to joining Mandiri Sekuritas, Alex has held various strategic positions, such as: Director at PT Indo Premier Sekuritas from 2014-2022, CEO of Food Solution Group at PT Cardig Aero Services Tbk in 2011-2013, Senior Manager Business Development South Asia at PT Cabot Indonesia in 2009-2011, and Vice President at PT Pangansari Utama in 2003-2009.