J N. N. Ng'ang' a runs a consultancy firm: TRAUMA CONSULTANCY LTD. He recently retired from the country leadership team of a multinational oil company as its operations manager but has had experience in business analysis, retail marketing, aviation marketing, distribution & depot management, health safety, and environment management, logistics, etc and was in charge of developing the Shell transport standards in 10 countries of East Africa.

In his private capacity, he has been a director in a national para-statal company, shell pension fund, etc, and was the founding chairman of among others, Mt Kinangop Girls Secondary School, and is the current chairman of, among others, International Bible Society East Africa Board, The Christian Professional Magazine, CITAM mission, and outreach board, CITAM Christian education board, the chief patron of Kenya Students' Christian Fellowship, etc. He is also a writer of leadership and interpersonal relations books like Friendship, Secret of contentment, Leadership - King David style, and Leaders source of influence.