He reports to B-M London health MD Amie Malkin in a manager role.
Knill left two months ago ahead of Ozone's merger this month with sister Bell Pottinger Group agency De Facto Communications. At Ozone, Knill was one of a senior management trio, alongside chairman Gareth Zundel and MD Paul Jarman.
He worked on the OTC launch of Zocor Heart-Pro in 2004.
The De Facto and Ozone merger was confirmed earlier this month, a move that killed off the latter brand (PRWeek, 3 November).