Maximising light in a dark envronment

Hi guys,
One of my many roles for work is in the security industry. I'm currently redigning some of the web sites and marketing for work so i'm going out to a few of our venues to take photo's of our staff. My attampts so far have been ordinary as I'm not sure what my settings should be in that type of environment and I'm relatively new to flash photography.
I have the kit lens, (I know what that is now
) and I'm using the SB600, (yer yer I know
)
Could you kind people help
One of my many roles for work is in the security industry. I'm currently redigning some of the web sites and marketing for work so i'm going out to a few of our venues to take photo's of our staff. My attampts so far have been ordinary as I'm not sure what my settings should be in that type of environment and I'm relatively new to flash photography.
I have the kit lens, (I know what that is now


Could you kind people help
