Susan Muthoni Ngigi is a is the alternate member to the Principal Secretary, Ministry of Finance and Planning (The Treasury). She is a Human Resource professional and a Member of Institute of Human Resources Management (IHRM). 

Susan holds a Bachelor degree in Sociology and Geography from Kenyatta University, Diploma in Business Management from Kenya Institute of Management (KIM) and a Higher Diploma in Human Resources Management from College of Human Resources Management (CHRM)

She also holds Professional certificates in; Senior Management, Human Resources Management and Development and HR Analytics. Susan is a Mental Health Champion under the programme in the State Department for Public Service.