Do I need to have written employment agreements?
There is no legal requirement to have a written employment agreement. The agreement with an employee could be verbal.
However, it is advisable to have a written agreement that clearly sets out the terms and conditions of employment. This will eliminate/reduce disputes about what was agreed to between the parties and is easier to enforce than a verbal contract.
A written employment agreement will also allow you to address and reduce your risks and liabilities. For example, you could address matters such as confidentiality and non-solicitation. You could also restrict your severance obligations to employees, by having a clear and unambiguous termination clause in the employment agreement.
If you have written employment agreements for your employees, you should make sure that the employee has time to read and understand the agreement, and that the employee signs the agreement before he or she starts working for you.