Jarvis was a senior planner at MRM Worldwide and he will join the agency along with a number of other appointments including John Jones as client partner. He will work on the agency's Wyeth account and was previously an independent e-communications consultant, working with clients including Ofsted and COI.
Syzygy has also recruited Reading Room project manager Will Green, who has been appointed account director on its Sky, Wyeth and Essent accounts.
Julian Clark, JPMH head of production, joins Syzygy as project manager and will work on Sky and Essent. Mona Ranjan also joins the firm as project manager and will work on the Wyeth account.
This latest wave of hirings comes in the wake of a senior agency appointment last month, when Syzygy hired Aaron Martin, the former joint creative director of Arc Worldwide UK, as executive creative director.