Hounslow LBC is to name Mary Harpley as its new chief executive, replacing interim post-holder Michael Frater.
Following confirmation of the appointment at a council meeting later today, Ms Harpley will take up her position on 17 January.
Ms Harpley is currently chief executive at Cherwell DC, where she has worked since 2006.
Her previous roles include corporate director for Advantage West Midlands and a consultant for McKinsey & Co.
Cherwell DC said discussions with South Northamptonshire DC over sharing their senior management teams would be unaffected by Ms Harpley’s departure.
Council leader Barry Wood (Con) said: “We will be sorry to see Mary leave us but are really pleased for her and wish her the very best in her new role.
“The financial reasons for sharing a team remain and the business case demonstrates clearly, in my view, why we should go ahead.”