"I am delighted to welcome Kjersti and Lucy to Babcock. Their knowledge and experience will strengthen our business further and be invaluable in helping to oversee Babcock's continued growth," said Chairman Mike Turner.
Wiklund has previously held several senior roles, including director of technology operations for Vodafone Group PLC, and Chief Operating Officer of VimpelCom Russia. She is also non-executive director of Laird PLC and Spectris PLC.
Dimes is currently a regional chief executive at events company UBM PLC.
Shares in Babcock were down 3.1% at