Uden will join Chemistry in July and will oversee the implementation and management of the agency's creative promotional marketing. His appointment is part of executive creative director Mike Caver's restructuring of Chemistry's digital, direct and promotional marketing business.
Uden is credited with helping Dynamo build a successful marketing team.
Cavers said: "Tim's background will generate a different perspective to our creative department which will add a new dynamic to our creative output."
Chemistry last week poached David Carr and Rob Trono from Publicis Dialog to boost its digital creative team, with Trono joining as senior art director and Carr as digital creative director.
The London-based agency has accounts with Yell, Diageo, Transport for London and Nestle.