BP Deputy CEO Carol Howle will retire later this year, the energy company announced Tuesday.

Howle, who has spent more than 26 years working for BP, took the position earlier this year to spearhead the review of the company’s business portfolio. Before taking that role, she served as executive vice president of supply, trading and shipping — a position she continued to hold as deputy CEO.

BP also announced that Kerry Dryburgh, EVP of people, culture and communications will retire after 16 years with the company.

Both executives will leave BP during the third quarter of this year.

“I want to thank Carol and Kerry for their outstanding commitment and contribution to bp and wish them every success for the future,” BP CEO Meg O’Neill said in a statement. “Carol led the company through a critical transitional phase as interim and then Deputy CEO. With her departure I have chosen not to replace the Deputy CEO role. We have significant actions underway to streamline the organizational model and we have a focused leadership team in place.”

BP has named Sam Skerry to replace Howle as EVP of supply, trading and shipping. Skerry has worked for the company for nearly 30 years, most recently serving as senior vice president of mergers and acquisitions and business development.

BP also named Sonya Adams as its new EVP of people and culture. Adams has spent more than 25 years with BP in roles spanning various departments across Asia, Europe and the U.K. She previously worked as chief of staff to the CEO.

Both executives will assume their roles on Aug. 1.

BP has made significant changes over the past year as it tries to improve its performance. This has included restructuring teams, divesting c-stores and appointing a new CEO in O’Neill. In early June, BP outlined an organizational restructuring that narrows its business down from three segments to two. That new structure takes effect today.