TalkTalk CFO Iain Torrens will step down later this year, with a Dixons Carphone executive lined up to replace him.
Torrens will leave the company at an unspecified date, TalkTalk said, without specifying a reason for his departure.
Further details will be announced in due course, the operator said.
The outgoing CFO, who joined the company in January 2015, will be replaced by Dixons Carphone’s Director of Investor Relations and Corporate Affairs Kate Ferry.
Ferry has worked at Dixons Carphone for seven years before which she worked at Merrill Lynch and PwC.
She joins CEO Tristia Harrison in a new-look top team.
The operator shook up it leadership following the departure of former CEO Dido Harding in May, which also saw Charles Dunstone take on the role of Executive Chairman.
Dunstone said: “As we continue our journey under the new leadership team and with a refocused direction, Kate brings a wealth of experience to the role.
“Her skills will work really well at TalkTalk and we're looking forward to working with her as we focus on delivering our new and exciting plan for the business."
The management shake-up follows a set of disappointing financial results.
At the time, the telco warned that marketing and acquisition costs would hit profits over the next financial year.