The Group's ventures include eConveyancer and ehips services.
Vanessa, previously head of paaleads.com within the moneysupermarket.com group where she spent the last 7 years, will report to United Group managing director Nigel Hoath.
She said: “I’m delighted to be joining the United Group which has established itself as one of the leading players in the online provision of conveyancing and HIPs services.
"The company has exciting plans for its continued expansion and I’m looking forward to helping the management team realise their ambitions.”
Nigel Hoath, added: “Vanessa is the ideal person to help us take eConveyancer and ehips onto the next stage of their development during 2008 and beyond.”
