Graduated in December 1997 with a B.A-Economics from University of Nairobi. Enrolled with KASNEB and pursued accountancy course upto CPA Part 111.Employed as an Auditor in Kimani Kerretts & Co. Ltd from 1998 to October 2001.

Since November 2001 upto 2013, Siele has served in banking industry for 13 years in various banks including Krepbank Ltd (Sidian Bank Ltd) as operation Manager, Housing Finance and Credit Bank Ltd as a Branch Manager. Dr Siele is a holder of Doctor of Philosophy in Economics and M.A-Economics. Currently, Dr Siele is a Tutorial Fellow in Economics Department. Siele is a seasoned Economist.