William S. Chadwick Jr., executive vice president and COO of Ensco, will retire from the company effective Aug. 31.
Stepping into the position will be Mark Burns, currently senior vice president – Western Hemisphere.

Chadwick joined Ensco in June 1987 as one of the organization’s first employees and served in leadership positions throughout his 25-year tenure. He was elected to his current position in January 2006.

Burns joined Ensco in 2008 and became senior vice president for the Western Hemisphere last year at the time of the acquisition and has been responsible for managing Ensco’s largest business unit, North and South America, and integrating a new business unit, Brazil. He will relocate from Houston to Ensco’s headquarters in London.

In other news, Steven J. Brady, currently vice president for Europe and the Mediterranean, will succeed Burns as senior vice president for the Western Hemisphere and relocate from Aberdeen to Houston. Julian Hall, currently manager for Operations, Europe and Mediterranean, will be promoted to vice president for Europe and the Mediterranean and will remain in Aberdeen. Derek Kent has been named vice president for the Middle East and Africa, effective immediately.