A number of the Sparx illustrators have backgrounds in design. The combination of illustration and design is quite common and often makes for quicker turnaround and a lighter budget.
A number of the artists have extensive experience in corporate branding and the importance of a well thought through and cohesive branding strategy.
Samples of design and logo are situated at the bottom of the individual pages. Please bear in mind this is a limited selection and there is usually a wealth of further examples in the offline portfolios.