Luc Julia was director of Apple's Siri project. This was a role he held for roughly 10 months, however he left Apple last year. Julia ended up going over to Samsung. Officially, Julia is a vice president at Samsung's innovation lab and while the natural thought would be that he is working on improvements to S-Voice, there is a bit more. Julia is actually working on something called SAMI (Samsung Architecture for Multimodal Interactions), which takes things a bit further.