What category of trade to choose.

I am searching of a professional to do two things: to put up metal panels that serve as a divider for a balcony, and secondly, to drill holes through a lintel above a window. The first work would involve screwing the metal panels into a metal frame, and the second is believed to involve a concrete lintel. My question is what category of trade should I choose to put out a quote? Indeed, I am not sure which trade relates more to this work. If you some could please let me know. Thank you.