Which technicians are requiered to build a building in Spain???

Generally to construct a building various professionals work together to get a building. The main technician is an architect who has to design planes, the other is a structural engineer who has to take the planes of architect and he calculates and designs a resistant structure. Then there is the building engineer or architecture engineer or technical architect who does the construction of a building, he has to create technical plans to construct the building.
The main technicians in Spain are an architect and technical architect. The architect designs the project and takes the charge as Project Director of the building. The technical architect takes the charge as execution work director who does the construction of the building.

The Project Director is the figure that involves in the construction of a building to construct it like it is projected in a plane.

The Executing Director finds ways to bring the idea of a designer into reality like he has to do everything that is necessary to do.

The other figure is the most common and everybody knows about it is the figure of the Project Manager. We can define that the project manager we can find in various processes of construction like we can find him in Construction company or the company which has done the calculation of the structure. As result this we can say the project manager in construction company has the charge to construct he has to do what the executive director and project director say, in other words, we can say he is the person who has to spend a lot of his time on the site. Whereas project manager in the process of a structure is another person from the company who has done the calculation.

Every technician has a lot of responsibility, however who has the most is technical architect (Building Engineer or Architecture Engineer, depending on country which you are) because execution is not too easy,  if in execution you do something wrong the element will get low resistance as a result of having incident in future caused by the element.