Wood will oversee the now 30-strong search and biddable team alongside Mark Pain and Juan Vargas, who continue in their roles of head of search and head of SEO.
The GroupM agency claims to have seen significant growth in the PPC, biddable media and SEO arena for its clients, which include BT, Barclays and Mercedez-Benz.
He joins Maxus from GroupM where he has been search operations director for the last two years, following stints at i-level and Sony UK.
Tim Irwin, chief operating officer for Maxus, said "We are delighted that Oliver has agreed to join us. Our search and biddable teams have more than doubled in size in the last 12 months. Oliver is a brilliant operator and will allow us to continue to push forward over the next 12 months."