Occupational Outlook Handbook
The United States Department of Labor has a valuable career resource called the Occupational Outlook Handbook, which can also be accessed through their new app. This online resource allows a person to search for job types by levels of education, on-the-job training, new job projections, job growth and pay. You can also search by categories. These are not job listings, instead the resource gives information on the career. Check out their information on plumbing jobs.
Growth for Trade Jobs
The Occupational Outlook Handbook shows growth in almost all trade related jobs, 14% for plumbing, 10% for electricians, 13% for HVAC, 5% for machinists, 3% for welders, etc.