Kirwa was born in
Tanganyika, currently
Republic of Tanzania. His father, Kiprono Cheptile Arap Sirng'ewo was a farmer and livestock keeper, who was among the Nandi people evicted from their fertile ancestral lands by the
British colonialists in
Nandi County to pave the way for
white settlers to develop the area that became the
white Highlands in the
Rift Valley. The late colonial senior chief Elijah Cheruiyot oversaw the issuing of the temporary British permit that allowed the families to enter the northern
Tanganyika, settling in Mara, Musoma, Bunda and Mwanza in 1951. His father begrudgingly settled there though he did not plan to live there for long. According to his parents, life had moved from bad to worse in their new unproductive foreign home. After Kenya attained its independence, they moved back to
Kenya around mid-1960s, settling in
Cherangany,
Trans Nzoia County. Kirwa started his elementary education and later secondary education in Kenya, and he excelled culminating in his admission to the
Egerton University where he acquired his tertiary education. He holds two master's degrees; Master of Science in Applied Management and Leadership from
The Management University of Africa, and Master of Arts in International Studies from the
University of Nairobi. He is also pursuing further studies at the
University of Nairobi which will lead to PhD in International Studies. == Political career ==