Kuhillow, who founded the agency's interactive division in 1999, becomes interactive director while Lohman is made systems director.
The agency has also made two new associate directors -- Alex Kisby becomes broadcast associate director and Jo McPhillips becomes strategic analysis associate director.
The promotions follow the news that MediaVest is expanding its interests in the regions with the opening of a Leeds office. The Leeds offshoot has just won the media planning and buying account for the family-owned supermarket chain Booths.
Managing partner Dave Lucas said: "Last year was a challenge for the whole industry and we had members of staff who made a significant contribution to our business. These promotions are fully deserved and reflect the drive within the company to become the UK's leading media agency."
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