The company has engaged recruitment consultant Whitehead Mann to handle the search and expects to make an appointment in late summer.
NatMags is planning to launch websites for Cosmopolitan, Good Housekeeping and Country Living this summer, and another crop in the autumn. It has already launched Youandyourwedding.co.uk and Babyexpect.co.uk, and acquired Netdoctor.co.uk.
Duncan Edwards, chief executive of NatMags, said: "We now need a senior manager to drive this new business forward, to realise our commercial objectives and to set the digital agenda for the group."
Last month, NatMags appointed Niall Hogan as its digital advertisement director. Hogan was previously the sales director at Emap Interactive.
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