Required list of Designations/Departments in construction industry?

Is there any site for Designation/Department? Am working with an construction industry in HR department. There are a lot of departments like safety, planning, Billing, Accounts, purchase, design, Administration, HR etc... and a lot of employees are working in different levels. So I want to give them proper Designation.
Also, I want to know what is difference between level and designation?
Your help wud be really appreciated.

Hi Vishal,
Designation and Levels are different. Each employee will get designation according to their nature of work and Levels is based on salary and designation. Different designation is clubbed together in levels according to their salary. Based on levels compensation or benefits decided in companies.
Feel free to call or revert for any assistance.
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