Nnenna Ilomechina

Global Chief Operating Officer

Nnenna Ilomechina is Global Chief Operating Officer for dentsu International and joined the business in May 2022.

Nnenna will oversee overall business operations and transformation enabling the execution of the Dentsu strategy and profitable growth.

Nnenna brings over 25 years’ leadership experience, driving digital and organisational transformation across digital, technology, media, and business services. Prior to Dentsu, Nnenna led transformations for clients at Accenture Strategy, where she was Managing Director & Partner, Head of Communications, and Media & High Tech (CMT) Strategy Practice for UK & Ireland. Prior to Accenture, Nnenna spent 12 years transforming multinational businesses globally as a Senior Director at AlixPartners where she built a leadership reputation of dedication, trust and consistency with clients and teams alike. Her career begun at Sapient (now Publicis Sapient), where she quickly rose to lead large scale global implementations involving digital, technology and creative.

Her professional accolades include Senior Professional Services Finalist at the 2020 Black British Business Awards, 50 Board Ready Women to Watch in 2019, and shortlisted for Women in The City Future Leaders Award 2014. 

Nnenna is also a strong advocate for social mobility, acting as a mentor to the next generation of ethnic minority leaders. Commitments include being a member of the Development Advisory Board for Music Masters and a Mentor for Women in Cable and Telecoms. 

Nnenna Ilomechina black and white headshot

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