Employment Contracts are only for employees — not independent contractors. Employees work for one employer, usually have a set schedule, and are often paid hourly or weekly. Typically, an employer provides the tools or equipment an employee needs to do their job.
An employee is obligated to sign an Employment Contract, which outlines their rights and responsibilities while at work.
An independent contractor is self-employed. They can work for many different clients, set their own work hours, use their own tools and equipment and invoice clients for work done. They are not employed by their clients, so they do not have the same legal protection as an employee.
Instead of an Employment Contract, cleaning contractors may sign a Cleaning Services Agreement to protect their financial interests.
The Canadian Revenue Agency (CRA) provides further details on the difference between employees and self-employed contractors.