Ole Lenku is a graduate of the University of Nairobi, where he obtained his Master of Business Administration in strategic management and Bachelor of Commerce in Marketing.

In the wake of the terrorist attack on the Westgate Mall in September 2013, Lenku spearheaded the rolling out of a new security framework known as "Nyumba Kumi" (ten households) anchored on the larger concept of community policing.

His tenure as Cabinet Secretary has also been met with increased acts of terrorism culminating in the Westgate Mall attack, which left 69 dead and scores of people injured.

Keton ole Soipei, Lenku's maternal grandfather was second in line in the leadership of Iterito age-group having lost the top position to Kapei.

In 2004, he was appointed General Manager of the David Livingstone Safari Resort, a five-star lodge in the Maasai Mara He served in this capacity until 2005 when he left the corporate sector and joined public service.

In the same month, he unveiled a committee headed by a former provincial administrator, Joseph Kaguthi, to oversee the implementation of the Nyumba Kumi initiative that requires Kenyans to know at least ten households within their neighbourhood as a way of fighting crime.

[20] The initiative, modelled on the Tanzanian "nyumba kumi" structure, has reported success in formerly insecure areas like Kirinyaga East in central Kenya, but not in places like Lamu at the Coast where gangs have continued to terrorise communities.

[22] July 2013 alone saw high-profile deportation of 24 foreigners believed to be key members of drug cartels operating in Kenya and who had been in the past arrested on narcotic offences.

[24] In another high-profile case, two South African women, Taran Louise Chukwu and Alicia Coetzer, were arrested and arraigned in court on charges of drug smuggling.

Since taking office he has implemented a series of reforms in the County Government and has focused development efforts in the sectors of Health, Lands and Education.

[citation needed] One of the Governor's Flagship Projects is the Mbuzi Moja Afya Bora initiative which sensitizes the community to embrace health insurance as a means of reducing the out of pocket household expenditure.

[citation needed] In the Education sector many new ECE centres and classrooms were built, millions of shillings in bursaries distributed, and 67 new ECD teachers employed.

On 29 September, Kenya's Foreign Affairs Cabinet Secretary Amina Mohamed told the Public Broadcasting Service (PBS) that there was a woman involved in the attack.

"[26] This spurned speculation that the woman in question could be Samantha Lewthwaite, also known as the "White Widow", who was wanted by Kenyan police over alleged links with a terrorist cell involved in attacks at the Coast.

[27] Alleged reports of leaked intelligence files also surfaced in Kenyan papers, indicating that Kenya's top security agents knew of an "increasing threat of terrorism" days before the mall was attacked.

On 5 April 2014, Bemih Kayonge of The Star described him as "gravely misinformed" on matters of national security, adding that ever since it came into power, the Kenyatta government "has shown no respect for the rule of law".

The opposition, civil society, Senate and National Assembly representatives also called for Ole Lenku's resignation, citing his ministry's failure to adequately respond to the attacks.

[36] Criticism against Ole Lenku reached fever pitch when on 22 November 2014 some 28 Kenyans travelling from the Northern town of Mandera were ordered off a bus and killed, with some of the bodies beheaded.

Kenyans protested on the streets of Nairobi, calling for the removal of Ole Lenku and the Inspector General of Police, David Kimaiyo.

[citation needed] The President succumbed to the pressure and announced that Ole Lenku had been dismissed, while the Inspector General of Police had resigned.

[citation needed] After his unsuccessful debut into elective politics in 2003, Ole Lenku ventured into business and farming, and partly because of his cultural status as a leader in the Maasai community, he has kept a relatively large herd of cattle, estimated at 600 animals.