After being given a job at a underworld casino as a bartender, his first assignment is to protect the owner’s goddaughter from an Russian sniper hellbent on getting her back.

If this is a John Wick kind of character, describe him as such. Instead of just "...bartender..." write 'assassin gone bartender' or 'retired assassin gone bartender'.

As stated by previous reviewers, the logline does not make sense. Even the antagonist's goal is fuzzy: a Russian sniper wants to get back together.
You, use John Wick as an example of a franchise movie starting mid way through. But in John Wick, it is clearly established that he is a former hitman/fixer for the mob who retired for love. Same thing?in?Under siege, it is quickly established that Steven Seagal's character is more than a mere cook.

When a broken former black ops soldier turned bartender saves an innocent women from murder, he is tasked by her estranged mobster godfather to protect her from her deranged sniper stalker.

I have the same concern as the other reviewers.? If he has these skills than why does he have to pull double duty as a bartender?? Why is he not already a bodyguard or hitman? You shouldn't need other movie ideas you haven't made yet to help explain the logline of the current movie.? The logline needs to stand on its own.? Him being a bartender doesn't seem to have much to do with what the story is actually about.? Make it stand out with irony that's believable.