Mechanical Techniques – Plumbing Posted on November 19, 2012 at 10:18 am. Grab a wrench and jump into the high-demand skilled trade field of plumbing. This one-year certificate program will provide you with skills sought by employers and position you at the front of workers competing for entry-level jobs in the plumbing industry, including apprenticeships. Graduates are eligible for an exemption for Level 1 of the in-school requirements for plumber 306A apprenticeship training.