My brother is currently pursuing the Construction Engineering Technician (T161) course from George Brown College. It is a two year course, and an extra year places it into an advanced diploma (T105). 

George Brown offers plenty of job opportunities from a variety of construction companies across Canada. The college regularly holds a job fair in which prominent companies like Bird Construction, Aecon, EllisDon, PCL, etc. take part. A large number of alumni from our college work at one or the other of these reputed companies. 

All the three colleges offer internships, but according to my brother, George Brown is a better option for the construction management program.