Given that... / Since... / Seeing as...
Introduces a reason or explanation. More formal than porque. Dado que + indicative. Common in written and professional Spanish.
Given that there's no agreement, we'll postpone the meeting.
Since you're the expert, what do you recommend?
Seeing as we have no more time, we'll conclude here.
Given that it's late, we should leave.
Given that you don't have time, I'll do it.