The Occupational Outlook Handbook from the U.S. Department of Labor can help you find information on job responsibilities, educational requirements and needed training for hundreds of occupations. You'll also find information on pay scales and the jobs availability outlook for the future.
Find it at https://www.bls.gov/ooh/
Start by choosing an appropriate "Occupation Group" on the left such as
or others and then choose a sub-category to find more information.
O*Net Online is another tool from the U.S. Department of Labor for learning about specific jobs and also for learning about which careers are better bets for future growth. You can search occupations by keywords such as "engineer," technician," "operator," and others, or you may use the "Find Occupations" tool to browse careers with a bright outlook, look at occupations the cluster together around similar skills, and by several other categories. For example, under Find Occupations choose Career Cluster and then use the pull down box to find Science, Technology, Engineering and Math.
Find it at https://www.onetonline.org/
The Ohio Department of Job and Family Services maintains a list of Occupational Profiles with Wages and Skills on their website. The page is arranged by something called SOC codes which you can find using O*Net (also covered in this guide) but you may also search by keyword such as "engineer" or "technician" or other terms appropriate to you career goals. Once you find an occupation name, click on it and then click on the Profile, Wages, and Skills buttons below the "definition of the occupation." (You'll need to use the "back" button in your browser after viewing one of these pages to access the the other buttons.
Find it here: http://ohiolmi.com/proj/SocOccCodes.htm