Master Plumber
https://wiki-byte.win/index.php?title=How_Do_You_Tell_If_You_Have_Hired_a_Certified_and_Expert_Plumbing_Technician%3F
The term 'specialist' is used for an individual delighted in the construction services. And building consists of constructing new structures, roads or dams in addition to modifying or repairing the existing ones.