- Salaried employee of a company. You'll get a base salary (typically yearly, paid either every two weeks, or twice a month.)
- Independent contractor or consulting engineer. You'll bill customers directly for your work, often on a project basis, with payments on key milestones.
- Hourly employee of a company. Instead of a salary, you'll get an hourly wage that determines your total pay based on the number of hours you work. Typically hourly employees are eligible for overtime pay (paid at a higher rate when working more than, for example, 40 hours per week.)
- Bonus payments, often based on performance. (Often a part of type 1 and 3. Sometimes also part of the contract for type 2.)
- Equity (stock) in a company. Often part of type 1. Common practice is to give "Restricted Stock Units" or "stock options" to employees that "vest" (become available for the employee to sell) over a period of time, typically three or four years. For example, a company might give a new employee 100 RSUs that vest over four years, with 25% coming available to sell every year.
- (Joke!) Bribes!
- Write a book. Textbook or something else related to your field.