The dairy was also expected to change its name with Tom Atherton becoming president and chief operating officer of Saputo Dairy UK.
Dairy Crest chief executive Mark Allen will step down as chief executive following the takeover by Canadian dairy giant Saputo.
Mr Allen has worked for the company for 28 years and wills step down on July 1 following a transition period.
Tom Atherton, who has worked for the firm since 2005, most recently as deputy chief executive, has been appointed president and chief operating officer of Saputo’s division in the UK.
The Dairy Crest name was also expected to disappear, with the company becoming Saputo Dairy UK.
Mr Atherton said: “It is a privilege to be asked to head a business of which I have been proud to have been a part for 14 years.
“Mark leaves a powerful legacy. Having seen the acquisition by Saputo through to completion, he leaves the business in a strong position.
“He has our appreciation and admiration for all that he has done, not just for Dairy Crest, but for the entire British dairy sector which was recognised in his award of an OBE earlier this year.
“We are at an exciting point in the company’s evolution. The expansion of our Davidstow creamery is progressing and we see great potential to develop our brands further by broadening our portfolio and seeking out new markets.
“As part of the larger Saputo organisation, we are well positioned to accelerate our growth plans both in the UK and internationally.”
Mr Allen said: “I leave knowing that Dairy Crest has changed beyond recognition during the 28 years I have been with the company.
“It is now a focussed, branded and added value business delivering some of the best margins in the sector globally. I am sure Saputo will build on these great foundations.
“I have enjoyed every minute of my time in the business and have had the pleasure of working with and for some amazing people.”