The two main designers of a structure are the architect and the civil engineer; both professions being integral to the structure's execution and construction. Their responsibilities often overlap.
The architect will design a space to meet the client's needs, and will come up with blueprints for both the inside and outside of a building. Because the architect is ultimately responsible that the building is safe for its occupants, he or she will work closely with a civil engineer to ensure the structure meets all the appropriate building codes.
The civil engineer can also advise and/or select the appropriate structural materials, and help with specifying the plumbing, electrical, heating, air conditioning, and ventilation systems that will be needed.
Related Careers

Psychologist
A psychologist is someone who studies mental processes and human behaviour by observing, interpreting, and recording how people relate to one another and the environment.
Social Worker
There are two main types of social workers: direct-service social workers, who help people solve and cope with problems in their everyday lives, and clinical social workers, who diagnose and treat mental, behavioural, and emotional issues.