Madrid-based illustrator Sergio Jiménez specialises in lettering and typography. Here, he tells us how he went from comic artist to graphic designer, and shares some of his best work.

How did you start your career as an illustrator?

I began studying illustration because of my love of comics. Then, I went to university to study fine arts and I discovered my passion for graphic design and lettering.

What's your favourite tool?

I think both craft and digital tools are essential in almost all projects, but if I had to name one it would be the paintbrush.

What techniques do you use most?

I used to start with a pencil drawing, but now, I use a paintbrush from the beginning, on paper or sometimes on acetate instead. Then, I scan it and work on it in Adobe Creative Suite. I work on the textures and colour in Photoshop, and then, for flat shapes, I use Illustrator.

What has been your favourite piece you've created and why?

I designed a poster for the Ricardo Rousselot tribute exhibition for the 4th Typography International Congress of Valencia in 2010 (right). It represents the beginning of a graphical language that I developed in other works later.

Which clients have you worked for?

My clients include Random House, Go Skateboarding, Rolling Stone, Coca Cola and Vodafone.

What are you working on now?

I am currently working on a campaign for a brand of soft drinks, a collaboration for a photo-zine and new illustrations for Go Skateboarding magazine.

What's your dream commission?

I'd love to collaborate on a film's title sequence.