These are some of the clients I have worked for:

Publishers: Prentice/Pearson (Argentina); McGraw-Hill (Spain); Marcial Pons (Spain). (See translated books)

Op-ed/journalism: Project Syndicate

Translation agencies: Andovar (Singapur); BBi Better Business International (UK); DelSur (Argentina); Hispano Language Advisory (Argentina); IMTT (Argentina); Logoscript (Spain); Patagonia Translations (Argentina); Spanish Backoffice (Argentina); Spanish Express (Argentina); Win & Winnow (Argentina); etc.

Non-javascript version. With javascript enabled, it looks a little better :)