The agency will join the incumbent Chemistry and the two will work to develop below-the-line activity for both the Velvet Toilet Tissue and Bodyform brands in 2004.
The two agencies saw off competition from EHS Brann and Proximity London to land the accounts.
The Velvet brand manager, Nick Dudman, said: "We are committed to enhancing the way we communicate with consumers and retailers and the 'love your bum' campaign has proven this. Craik Jones and Chemistry will allow us to drive innovation with our new BTL activities."
SCA is also reviewing its £100 million pan-European creative account.
The business, worth £11 million in the UK, is being reviewed out of Copenhagen by Helle Dahlgren, the marketing manager of the company's feminine and incontinence product portfolio.
Earlier this year, SCA launched the "love your bum" campaign for Velvet.
It featured TV ads showing a series of anonymous bottoms.
The £15 million campaign also featured direct marketing activity and outdoor media and has been rerun during the past month.
The appointment caps a positive 2003 for Craik Jones in terms of new business. The agency landed a place on the NatWest roster earlier this year and has also won briefs from Marks & Spencer and The National Trust.