Yes the officers are Greek on Celebrity.
They seem to me to be less friendly then those of some other cruise lines,
don't get involved in conversation.
Ships are very nice food is great, always enjoyed our cruises on Celebrity.
I think the deal is that English is not as comfortable for them as it is for officers of other nationalities. That said, I have found the Celeb officers to be gentlemen and not much given to high humor.
HOWEVER ... I sat next to a Captain at dinner one night, totally covered up because I had a nasty cold. Queeg was next to a woman whose dress was cut up to here and down to there. I said to the Captain, "Wouldn't you prefer to change places with my husband?"
"Madame," he said, "I prefer brains to breasts any day."
Next day, Barbados. We are on the fantail with a box of tissues and books. Captain and his retinue walk by. (Because it was Barbados, I was wearing a bathing suit.)
Captain takes a close look at me, bows slightly, and says, "Ah, Madame, I see you have BOTH!"
Unless you speak Greek I don't think you'll have many conversations with the officers aboard Celebrity ships. The officers on RCI all speak fluent English and I have had many interesting conversations over the years sailing RCI ships. I also remember several conversations with Italian Captains aboard some of the Costa fleet.(Two of these captains were old Home Lines captains and they were friendly and informitive and spoke English quite well)
True story. Back in the 1920s/1930s Lady Astor was crossing the Atlantic in one of those glorious ocean liners. One night at dinner she was asked if she would like to have dinner with the Captain at his table. Her reply was "I do not eat with the help".
We have had good luck meeting Celebrity officers as well, mostly the younger ones near our age. I have found the Cova Cafe area on most of the ships is often a pretty big staff hang out as well, especially the ones who smoke. I'm a non-smoker now so maybe I won't be meeting them anymore !