Claudio is a photographer that loves sea and a post producer specialised in photojournalism.
As post producer he worked, works and will work with amazing photojournalists like Yuri Kozyrev, James Nachtwey, Francesco Zizola, Marcus Bleasdale, Lynsey Addario, Adam Ferguson, Alessandro Cosmelli, Gaialight, Tanya Habjouqa, Anastasia Taylor-Lind, Marco Longari, Stanley Greene, Massimo Siragusa, Paolo Pellegrin, and many many others.
You can see his tonings, on magazines like TIME, New York Times, National Geographic, l'Espresso.... or browse his (partial and slowly updated) toning portfolio on this site.
He wrote the "RAW and postproduction" book for italian National Geographic collection "Master di Fotografia"
Of course, you can ask him for a workshop in your place.
Some link about him :