Mr. Kirui is an environmental planner with over 12 years in environmental and developmental project with experience spreading all over East Africa and Horn of Africa. He is currently a PhD candidate and tutorial fellow at Kenyatta University (KU) in the School of Environmental Studies. He is a holder of Masters of Environmental Planning and Management (EPM) and B. EPM both from (KU).  He also has many certificates in his area of specialization. Some of these certificates include: Certificate in Public Private Partnership (PPP) for Development awarded by Yale (USA) and Kenyatta University Kenya, Certificate in Standardization of Geographical Names awarded during the toponymy training for East Africa awarded by United Nations Group of Experts on Geographical Names (UNGEGN) /Africa Organization for Remote Sensing (AOCR) /Regional Centre for Mapping of Resources for Development (RCMRD) and Certificate in Training of Trainers (TOT) awarded by World Vision International.

Professionally Mr Kirui has been involved in projects such as: Catchment capacity building and planning training programme for Lake Victoria North (LVN) Catchment Area staff and the Sosiani Water Users Association and review of 10 Micro-Catchment Action Plans and development of materials for training of trainers (TOT). He is also a Facilitator, Africa Nazarene University (Nairobi), Environmental Impact Assessment/Audit Course, (teaching EIA Methods, Environmental valuation, EIA ethics, Environmental Management Plan and Water Quality Regulations, Environmental Review and Decision Making).

He has was a Lead Consultants for Inter-Governmental Authority on Development (IGAD) w here he undertook Regional DRM Mainstreaming into National planning in Five States of IGAD, participated in a project titled ‘Working with small holder farmers in the semi arid areas to enhance food security through rain water harvesting and innovative cropping systems funded by the Vice Chancellor’s Research Grant’ and another  titled Sustainable management and utilization of wetland resources for poverty alleviation in the River Nzoia (Kenya), Nakivubo Basin (Uganda) and Mwanza Gulf Tanzania) funded by the Lake Victoria Research Initiative (VICRES) and the Inter University Council of East Africa (IUCEA’. He has also participated in formulation of the National Disaster Policy Development for GoK.

Mr. Kirui is registered with NEMA and practicing EIA/EA Lead Expert No. 400. He has participated in over 250 EIA/EA projects.